Spinach and Feta Crustless Quiche
A tender, custardy bake of whisked eggs and milk folded around wilted spinach, sweet sauteed onion and garlic, and pockets of briny feta finished with olive oil.
Why You'll Love This Recipe
A meatless midday meal that will actually hold you all the way through to dinner without a snack. Eggs, spinach, onion, garlic, and feta do all the work, and skipping the crust entirely means it comes together in one skillet with no rolling, chilling, or blind-baking. It slices into neat wedges, which makes it easy to portion for a packed lunch or a quiet plate at home.
The water comes out of the spinach before the eggs go in. Cooking the greens down until their released moisture evaporates keeps the custard from turning watery, so it sets into a tender, sliceable texture rather than weeping on the plate. Sauteing the onion and garlic first builds a mellow, sweet backbone, and folding most of the feta into the eggs seasons the whole bake from within while the reserved crumbles on top brown and sharpen. Pulling it from the oven the moment the center stops jiggling, then letting it rest, is what gives you clean wedges instead of a rubbery slab.
Protein-rich eggs and feta, with the volume and minerals of a generous amount of spinach behind them. The eggs and cheese give it real staying power, the olive oil adds a smooth richness and heart-friendly fats, and the greens bring color, fiber, and a faint earthiness that balances the salty tang of the cheese. It is filling without being heavy, and it eats just as well warm from the oven as it does cool from the fridge.
Ingredients
- 10 large eggs
- 1 1/3 cups crumbled feta
- 10 cups fresh spinach
- 1 medium onion, diced
- 1/2 cup milk
- 3 tbsp olive oil
- 3 garlic cloves, minced
Instructions
- Preheat and prep: Preheat the oven to 375°F (190°C). Dice the onion, mince the garlic, and rinse the fresh spinach if it is not pre-washed. Crumble the feta if it came in a block, since the pre-crumbled kind is dusted with starch to keep it loose in the tub and that starch keeps it from softening into the eggs.
- Saute the aromatics: Heat the olive oil in an oven-safe skillet over medium heat. Add the diced onion and cook, stirring occasionally, until soft and translucent, about 5 minutes. Add the minced garlic and cook until fragrant, about 30 seconds, being careful not to let it brown.
- Wilt the spinach: Add the spinach to the skillet in handfuls, stirring after each addition and letting it collapse before adding more. Cook until fully wilted and any released water has cooked off, 3 to 4 minutes, because spinach holds a startling amount of it and anything left in the pan ends up in the custard, which will then never set. Spread the spinach in an even layer across the pan and remove from the heat.
- Whisk the custard: In a bowl, crack the eggs and beat well with the milk until the mixture is uniform and slightly frothy, since a streak of unbeaten white sets into a rubbery patch in the middle of the quiche. Stir in most of the crumbled feta, holding a little back to finish the top.
- Assemble: Pour the egg mixture evenly over the spinach in the skillet and gently shake the pan to settle it into an even layer. Sprinkle the reserved feta across the top.
- Bake: Bake at 375°F (190°C) for 22 to 25 minutes, until the center is just set and no longer jiggles when the pan is nudged and the edges are lightly golden. Let it rest 5 minutes before you cut it, since the custard firms as it cools and a hot wedge slumps on the plate. Then slice it and serve.
Variations
- Sun-dried tomato and herb: Fold chopped oil-packed sun-dried tomatoes into the egg mixture along with the feta for a sweet-tart bite and deeper color against the greens.
- Roasted red pepper: Stir in drained, patted-dry jarred roasted red peppers with the spinach for a smoky sweetness that plays off the briny cheese.
- Swiss chard swap: Trade the spinach for chopped Swiss chard; slice the stems thin and start them with the onion so they soften, then add the leaves to wilt.
- Dill and lemon: Add chopped fresh dill to the custard and a little grated lemon zest to the top before baking for a brighter, more herbaceous finish.
- Extra-creamy top: Dot the surface with spoonfuls of ricotta before baking for soft, pillowy pockets; note that this adds dairy.
Storage & Leftovers
Refrigerate leftover wedges in an airtight container for up to 4 days. Let the bake cool to room temperature before covering so condensation does not collect and soften the surface.
To reheat, warm a wedge in a 325°F (163°C) oven or toaster oven for about 10 minutes until heated through; this keeps the edges from turning rubbery the way a microwave can. If you are in a hurry, a microwave works in short bursts at reduced power. It is also good cold, straight from the fridge.
To make ahead, bake it fully, cool, and refrigerate; the flavor deepens overnight as the feta and garlic settle in. You can also saute and wilt the spinach a day early and refrigerate it, then whisk the eggs and assemble just before baking.
Notes & Tips
- Dry the greens well: Fresh spinach carries a surprising amount of water. Cook it down until the pan looks dry and the greens have shrunk dramatically before adding the eggs, or the custard can turn loose in the center.
- Taste your feta first: Feta ranges from mild to very salty depending on the brand and whether it is packed in brine. Taste a crumble before you season the eggs at all and hold back if the cheese is especially sharp.
- Use a truly oven-safe pan: A cast-iron or all-metal skillet moves straight from stovetop to oven. If your only oven-safe pan has a plastic-handled lid, leave the lid off, and avoid nonstick handles that are not rated for the oven.
- Know when it is set: Nudge the pan; the center should stop wobbling and a knife inserted just off-center should come out clean. A little residual heat finishes it during the rest, so pull it before it puffs and cracks.
- Let it rest before slicing: The five-minute rest lets the eggs firm up so the wedges hold their shape. Cutting too soon gives you softer, messier slices, though they still taste good.
- Round out the plate: A simple green salad with a lemony dressing or a few slices of ripe tomato alongside adds freshness and turns a wedge into a fuller meal.
Nutrition & Mindful Eating
- Egg, milk and feta set into a custard that carries an enormous amount of spinach. The eggs give it structure, the milk keeps it soft rather than rubbery, and the feta seasons the whole tray from the inside.
- The milk is what makes this custardy rather than firm. Whisked into the eggs it lightens the whole set and keeps the center wobbling slightly when the tray comes out, and it brings calcium and a little more protein into every slice.
- Spinach wilted and squeezed dry before it goes in keeps the quiche from weeping in the dish, and it stays in distinct dark ribbons rather than dissolving, carrying vitamin K and folate along with all that green.
- Feta crumbled through goes soft and tangy where the heat reaches it and stays firm inside the larger pieces, so the salt lands in bursts rather than evenly, and it brings calcium along with that sharpness.
- Onion and garlic soften in olive oil before anything else happens, so the base of the tray is already sweet and fragrant by the time the eggs go over, and the slow cook makes both gentle enough to sit well.
- As you eat, look at how the center is still barely set while the top has gone golden, and how the feta arrives in bursts, and take a slice on a plate rather than picking at the edges of the dish.
Frequently Asked Questions
Can I use frozen spinach instead of fresh?
Yes. Thaw it completely and squeeze it very dry in a clean towel before adding it to the sauteed onion, since frozen spinach holds a lot of water that would otherwise loosen the custard. You will need far less by volume than fresh, as it is already cooked down.
Why did my quiche turn out watery in the middle?
Usually it is either spinach that was not cooked dry enough or pulling it from the oven a touch too early. Wilt the greens until the pan looks dry, and bake until the center no longer jiggles when you nudge the pan.
Do I have to use an oven-safe skillet, or can I bake it in a dish?
You can saute the onion, garlic, and spinach in any skillet, then transfer everything to a greased baking or pie dish, pour the egg mixture over, and bake as directed. An oven-safe skillet just saves you a dish.
Can I make this the night before serving?
Yes. Bake it fully, cool, and refrigerate, then reheat wedges in a low oven before serving. The flavor is often even better the next day as the garlic and feta settle in.