Sheet-Pan Trout with Delicata Squash, Kale, and Toasted Almonds
Delicata rings and torn kale roast hard on one pan, trout fillets go on for the last ten minutes, and toasted almonds and lemon finish the whole thing.
Why You'll Love This Recipe
This is my late-October dinner, the one I start making the week delicata shows up at the market and keep making until it disappears. It is a single pan, about forty-five minutes start to finish, and most of that is the oven working while I do something else. I built it around delicata specifically because the skin is thin enough to eat, which means no peeling and no wrestling a hard squash with a knife. You slice it into half-moons and it goes straight onto the pan. For a weeknight that matters more than it should.
The trick to a fish traybake is that the vegetables and the fish want completely different lengths of time in the oven, so you stagger them. Squash and shallots get a twenty-minute head start at high heat, long enough for the cut sides to go deep copper and the sugars to concentrate. Then the kale goes on, torn wide so the edges frizzle rather than steam, and the trout lays on top of everything for the last ten. Fish this thin cooks fast. The almonds toast in the residual heat of the pan while you are getting plates down.
On the plate it is sweet, savory, and bitter all at once, which is a combination I never get tired of. The squash goes almost candied at the edges, the kale is smoky and brittle in spots and soft in others, and the trout sits somewhere in between, rich and gentle, holding onto the thyme and the garlic that roasted beside it. Lemon at the end is what pulls it together. Each person gets a whole fillet and a good pile of everything else, which makes this a proper dinner rather than a plate that needs a side.
Ingredients
- 4 trout fillets (about 4 oz each), skin on, patted dry
- 2 delicata squash (about 1 lb), halved, seeded, and cut into 1/2-inch half-moons
- 1 large bunch lacinato kale (about 14 oz), stems removed and leaves torn into wide pieces
- 1/2 cup raw almonds, roughly chopped
- 2 shallots, peeled and cut into thick wedges
- 5 tsp extra-virgin olive oil, divided
- 4 garlic cloves, smashed and peeled
- 1 tbsp fresh thyme leaves
- 2 tbsp fresh lemon juice, plus wedges for serving
- 1/2 tsp coarsely ground black pepper
- 1/3 tsp fine sea salt
Instructions
- Heat the oven and prepare the squash: Heat the oven to 425°F and set a large rimmed sheet pan inside while it comes up. Halve the delicata lengthwise, scoop the seeds out with a spoon, and cut each half into half-inch half-moons. Leave the skin on. Toss the squash with the shallot wedges, the smashed garlic, three teaspoons of the olive oil, half the pepper, and half the salt.
- Roast the squash hard: Spread the squash and shallots on the hot pan in a single layer, cut sides down wherever you can manage it, and roast for twenty minutes without stirring. You want the undersides deep copper and the shallot edges browning. A crowded pan steams, so use the biggest one you own or split it across two.
- Add the kale: Toss the torn kale with the remaining two teaspoons of oil and the rest of the salt, working the oil into the leaves with your hands for about thirty seconds so every piece is coated. Push the squash toward the middle of the pan and scatter the kale around the edges where the heat is highest. Roast eight minutes, until the thinnest edges are dark and crisp.
- Lay on the trout: Pat the trout fillets dry and season them with the remaining pepper and the thyme. Clear four spaces on the pan and lay the fillets skin side down directly on the metal. Roast eight to ten minutes, until the flesh has gone from translucent to opaque and flakes when you press a fork into the thickest part. An instant-read thermometer will show 130°F to 135°F (54 to 57°C). That leaves the trout moist and short of the FDA figure of 145°F (63°C) for seafood, which is the one to use if you want it firm.
- Toast the almonds: While the fish roasts, put the chopped almonds in a dry skillet over medium heat and shake them for three to four minutes, until they smell nutty and have taken on color at the cut faces. Tip them onto a plate right away, because they keep browning in a hot pan.
- Finish and serve: Squeeze the lemon juice over the whole pan the moment it comes out of the oven, so it hits everything while it is still steaming. Scatter the almonds over the top and serve straight from the pan, giving each person a fillet, a handful of squash, and plenty of the crisp kale.
Variations
- Maple and mustard: Whisk a teaspoon of maple syrup into a teaspoon of dijon and brush it over the trout before it goes into the oven for a sweet, sharp glaze.
- Chile and orange: Swap the lemon for orange juice and add a pinch of cayenne to the squash for a warmer, rounder finish.
- Sweet potato: Use half-inch cubes of sweet potato in place of the delicata, giving them twenty-five minutes rather than twenty.
- Sesame instead of almond: Scatter two tablespoons of toasted sesame seeds over the finished pan for a nuttier, finer crunch.
- Herb shower: Finish with a handful of torn parsley and dill along with the almonds for something fresher and greener.
Storage & Leftovers
The vegetables keep four days in the refrigerator and the trout keeps two, so I store them separately and treat them as two different leftovers. The kale loses its crispness overnight no matter what you do, which is worth knowing before you are disappointed by it on day two.
Reheat the squash and kale in a hot dry skillet for three or four minutes, spread flat and left alone at first, which brings some of the browned edges back. The trout is better cold than reheated, flaked over greens with a little lemon, because a second trip through heat tightens it up.
Roasted delicata freezes acceptably for two months in a flat sealed bag and comes back best in a hot oven rather than a microwave. I would not freeze the trout or the kale. If you want to prep ahead, slice the squash and tear the kale up to two days early and keep them in the refrigerator ready to toss with oil.
Notes & Tips
- Preheat the pan itself: Squash laid on hot metal starts browning immediately. A cold pan gives the squash time to release water first, and then it steams rather than caramelizes.
- Massage the oil into the kale: Thirty seconds of working the oil in with your hands coats every crease. Kale drizzled and stirred with a spoon roasts unevenly, so some pieces burn while others stay leathery.
- Dry the trout properly: A wet fillet steams and the skin never tightens. Two minutes with paper towel, both sides, is the whole difference.
- Watch the fish, not the clock: Trout goes from perfect to chalky in about ninety seconds. Start checking at eight minutes and pull it when the center is just barely opaque, because it carries on cooking on the pan.
- Toast the almonds separately: Almonds scattered onto a roasting pan burn before anything else is finished. A dry skillet gives you control and takes four minutes.
- Squeeze the lemon while it steams: Acid on hot food carries. Wait until the pan has cooled and the juice sits on the surface rather than going through everything.
Nutrition & Mindful Eating
- Trout, kale, squash, and almonds each do one job here. The fish carries the protein and the richness, the kale brings the mineral backbone and the fiber, the squash brings sweetness and color, and the almonds bring the crunch that keeps the plate from going soft.
- Trout is a fatty freshwater fish with a gentle flavor, and the fat is where the long-chain omega-3s sit. It is also generous with vitamin B12 and selenium, which is a good return on a fillet that cooks in ten minutes.
- Kale roasted at high heat goes brittle and smoky at the edges, and it holds onto its calcium and vitamin K through the oven. Torn wide and coated in oil, it eats more like a crisp than a leaf.
- Delicata squash has a thin edible skin and flesh that turns almost candied where it meets hot metal. The deep orange color is beta-carotene, and the skin is where a good share of the fiber lives.
- Almonds toasted in a dry pan smell like the best part of the meal, and they bring calcium and vitamin E along with that crunch. Scattered on at the end, they stay snappy against the soft squash.
- As you eat, look for the darkest scalloped edges of the squash and the papery bits of kale hiding under the fish, and give yourself long enough at the table to notice when you have had the right amount.
Frequently Asked Questions
Do I really not peel the delicata?
You really do not. The skin on delicata is thin and it softens completely in a hot oven, which is the whole reason to buy this squash for a weeknight. Butternut and acorn are a different story and want peeling, so if you swap, plan for that.
Can I use a different fish?
Arctic char behaves almost identically and is the closest match. Salmon fillets work with two or three extra minutes, and thin cod fillets work with two or three fewer. Whatever you use, add it at the end rather than at the start, or it will be dry by the time the squash is done.
My kale burned. What went wrong?
Either the pieces were too small or they went on too early. Tear them wide, at least the size of your palm, and put them on for the last eight minutes only. Some blackening at the very tips is what you want, and it tastes better than it looks.
Can I make this ahead for a weeknight?
Partly. Roast the squash and shallots fully, cool them, and refrigerate. On the night, spread them on a hot pan with the kale for eight minutes, add the trout, and you have dinner in twenty. The fish is not worth cooking ahead.