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Herb-Crusted Chicken With Green Beans

Juicy roasted chicken breasts under a Dijon, parsley, and thyme crust, served with garlicky green beans and burst cherry tomatoes brightened with lemon.

By Camille McLaughlin, RDN, LD, registered dietitian nutritionist

Built forDASHDinner
Also fits Heart-Healthy Balanced Paleo High-Protein Low-Carb Anti-Inflammatory Whole30 GLP-1
Dijon, parsley, and thyme go on thick and bake into a green crust that holds the chicken breasts juicy underneath. Cherry tomatoes split and slump in the pan, green beans stay snappy with garlic browning in the olive oil around them, and lemon goes over the whole tray at the end.
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Why You'll Love This Recipe

This is a one-pan roast dinner built for a busy weeknight, when you want something that feels a little bit special without a sink full of dishes. The mustard-herb crust gives mild chicken breast real character, while the green beans and cherry tomatoes roast alongside so the whole meal finishes at once. It suits anyone watching their sodium and looking to lean on vegetables and roasted chicken rather than heavy sauces or starch.

The Dijon-and-herb paste is what makes it stick. Mustard is thick enough to cling to the chicken and hold the parsley, thyme, and garlic against the meat, so instead of sliding off they toast into a fragrant, savory crust as the chicken roasts. Meanwhile the tomatoes soften and release their juice, which mingles with lemon and olive oil to make a light pan sauce for the green beans. Roasting everything hot and uncovered keeps the beans crisp-tender and lets the tomatoes blister rather than steam.

A big, filling portion of protein sits next to a real serving of vegetables, and the brightness of lemon and the sweetness of roasted tomato tie the two halves together. It is rich in protein to keep you full, generous in fiber from the green beans, and full of flavor from herbs and garlic rather than salt, so you finish feeling nourished rather than weighed down.

Herb-flecked roasted chicken breasts beside blistered green beans and burst cherry tomatoes. Save
Prep: 15 minsCook: 30 minsTotal: 45 minsMakes: 4 servingsServing: 1 chicken breast with about 1 cup green beans and tomatoes

Ingredients

Serves4Amounts change with the number. The nutrition panel is per serving, so it stays the same.
  • 4 boneless chicken breasts (about 145 g each)
  • 4 cups trimmed green beans
  • 1 1/2 cups cherry tomatoes
  • 2 tbsp Dijon mustard
  • 1/2 cup chopped parsley
  • 2 tsp fresh thyme
  • 4 garlic cloves, minced
  • 3 tbsp olive oil
  • 2 tbsp fresh lemon juice
  • 1/2 tsp sea salt

Instructions

  1. Preheat the oven: Preheat the oven to 425°F (220°C) and set a rack in the middle position. Have a large rimmed sheet pan ready.
  2. Prep the aromatics: Finely chop the parsley, strip and chop the fresh thyme leaves, and mince the garlic. Trim the stem ends from the green beans and halve any cherry tomatoes that look large so they roast evenly.
  3. Make the herb crust: In a small bowl, stir together the Dijon mustard, chopped parsley, thyme, minced garlic, and a portion of the olive oil until it forms a spreadable paste. Pat the chicken breasts dry, then spread the mustard-herb mixture evenly over the top and sides of each one.
  4. Season the vegetables: On the sheet pan, toss the trimmed green beans and cherry tomatoes with the remaining olive oil, the fresh lemon juice, and the sea salt. Spread them into a single layer and push them toward the edges to make room for the chicken.
  5. Roast: Tuck the crusted chicken breasts among the vegetables, crust side up. Roast for 25 to 28 minutes, until the green beans are tender and lightly blistered and the chicken registers 165°F (74°C) at the thickest part on an instant-read thermometer and its juices run clear.
  6. Rest and serve: Let the chicken rest a few minutes so the slices stay moist, then plate each breast with a generous helping of the green beans and tomatoes and spoon any pan juices over the top.
Nutrition Facts
4 servings per recipe
Serving size1 chicken breast with about 1 cup green beans and tomatoes
Calories320
% Daily Value*
Total Fat 15g19%
Saturated Fat 3g13%
Trans Fat 0g
Cholesterol 90mg30%
Sodium 464mg20%
Total Carbohydrate 12g4%
Dietary Fiber 4g14%
Total Sugars 5g
Includes 0g Added Sugars 0%
Protein 36g
Vitamin D 0.1mcg1%
Calcium 81mg6%
Iron 3.0mg17%
Potassium 689mg15%
* Percent Daily Values are based on a 2,000 calorie diet. Values are computed from USDA FoodData Central and are estimates. Per serving (1 chicken breast with about 1 cup green beans and tomatoes).

Variations

  • Lemon-caper finish: Stir a spoonful of rinsed capers into the vegetables before roasting and add a little extra lemon juice at the end for a sharper, brinier plate.
  • Smoky paprika crust: Add smoked paprika and a pinch of cayenne to the mustard-herb mixture for a warmer, gently spiced version.
  • Swap the vegetable: Trade the green beans for trimmed asparagus or halved Brussels sprouts; give firmer vegetables like sprouts a few extra minutes so they roast tender.
  • Thigh version: Use boneless skinless chicken thighs in place of the breasts; they stay especially juicy and may need a couple more minutes to reach a safe internal temperature.
  • Herb swap: Replace the thyme with fresh rosemary or oregano, or add chopped basil to the parsley, to shift the crust toward a different herbal note.

Storage & Leftovers

Store leftover chicken and vegetables together in an airtight container in the refrigerator for up to three to four days. Spoon the pan juices over the top before sealing so the chicken stays moist.

To reheat, warm gently in a 325°F (163°C) oven or a covered skillet over medium-low heat just until heated through; the chicken is already fully cooked, so a light warming keeps it tender rather than drying it out. A brief stint in the microwave works too, covered loosely so the beans do not shrivel.

To get ahead, mix the Dijon-herb paste and trim the green beans up to a day in advance and keep them refrigerated in separate covered containers. When dinner comes, you only need to coat the chicken, toss the vegetables, and roast.

Notes & Tips

A few notes from my kitchen to help this come out juicy, bright, and full of flavor every time.
  • Even thickness cooks evenly: If your chicken breasts are thick on one end, gently pound them to a more even thickness or butterfly the fattest ones so they finish at the same time and none dry out.
  • Trust the thermometer: Chicken breast goes from juicy to dry quickly, so pull it the moment the center reads 165°F (74°C) rather than guessing by time; ovens and breast sizes vary.
  • Choose firm green beans: Pick beans that snap cleanly and look bright, not rubbery or spotted; fresher beans hold their crisp-tender bite through roasting.
  • Dry chicken, better crust: Patting the breasts dry before spreading on the mustard paste helps the crust grip and brown instead of sliding off in the pan.
  • Don't crowd the pan: Give the beans and tomatoes room in a single layer; piled up, they steam and stay soft instead of blistering and concentrating in flavor.
  • Round out the plate: This is lighter on starch, so it pairs well with roasted potatoes, cooked quinoa, or a slice of crusty bread to soak up the tomato-lemon pan juices.

Nutrition & Mindful Eating

Mustard, garlic and herbs pressed onto the chicken set into a crust in the oven that keeps the breast juicy underneath, while the green beans and tomatoes roast alongside and catch whatever runs off.
  • The chicken, the herb crust and the vegetables all cook on one pan, so the beans and tomatoes pick up the mustard and olive oil coming off the meat and the whole tray tastes like it was seasoned together.
  • Chicken breast is fine-grained and mild, which is exactly why it takes a crust this well, and protein this dense is what makes the pan eat like a full dinner.
  • Dijon mustard is the glue here. It holds the herbs against the meat, and its sharpness cuts through the olive oil so the crust tastes bright rather than rich.
  • Green beans roasted until they blister keep a snap in the middle, and the cherry tomatoes beside them burst and go jammy, giving the plate both crunch and something sweet and acidic to spoon over the chicken.
  • Thyme, parsley and garlic go on before the oven and the lemon goes on after, so you get the toasted, almost nutty herb flavor from the crust and the raw citrus lift sitting on top of it at once.
  • As you eat, break the crust with the side of your fork and take in the thyme and lemon coming off it, then give yourself the length of a meal rather than the length of a break.

Frequently Asked Questions

Can I use frozen green beans instead of fresh?

Fresh is best here because it blisters and stays crisp-tender. If you only have frozen, thaw them fully and pat them very dry first, otherwise they release water and steam rather than roast; they may also need a couple fewer minutes.

My chicken finished before the vegetables were tender. What happened?

Thin breasts cook fast. Remove the chicken when it reaches 165°F (74°C) and keep it warm, then return the pan to the oven for a few more minutes until the beans are tender and the tomatoes have burst.

What kind of mustard works if I don't have Dijon?

A grainy whole-grain mustard works well and adds nice texture. Yellow mustard is milder and more tangy; it will still cling and crust, just with a sharper, less complex flavor.

Can I make this on the stovetop instead of roasting?

You can sear the crusted chicken in a skillet over medium heat until it reaches 165°F (74°C), then cook the beans and tomatoes separately in the same pan until tender, but you lose the concentrated, blistered flavor that roasting on one sheet pan gives.