Roasted Asparagus Frittata

⏲ ~43 min total · prep 12 · cook 31 · 4 servings

By the KFI Test Kitchen · Tested & approved by Jason Lieu, KFI recipe editor

Published Sep 15, 2026 · Updated Sep 15, 2026

Ingredients

• 1 lb asparagus, woody ends snapped off
• 8 large eggs
• 1/3 cup whole-milk ricotta
• 1/2 cup Parmesan, finely grated, divided
• 2 tbsp olive oil, plus more for the dish
• 1/2 tsp lemon zest
• 1 shallot, thinly sliced
• Salt and black pepper

Instructions

1. Heat the oven to 425°F. Toss the asparagus and shallot with the olive oil and 1/2 tsp salt on a rimmed baking sheet and roast 10-12 minutes, until the tips are blistered and the stalks bend without snapping.
2. Drop the oven to 350°F and oil an 8x8-inch baking dish.
3. Snip the roasted asparagus into 1 1/2-inch pieces directly into the dish and spread them with the shallot into an even layer.
4. Whisk the eggs with 1/4 cup of the Parmesan, the lemon zest, and pepper, then pour over the asparagus.
5. Dollop the ricotta over the top in 5-6 spoonfuls and finish with the remaining 1/4 cup Parmesan.
6. Bake 18-22 minutes, until the edges pull from the sides of the dish and the center barely jiggles when nudged.
7. Rest 10 minutes before cutting into squares — this one is just as good at room temperature.

Why this recipe works

• Roast before baking Roasting the asparagus at 425°F blisters the tips and drives off the water raw spears would release into the bake.
• Ricotta dollops Spoonfuls of whole-milk ricotta bake into soft, mild pockets set against the sharp Parmesan in the eggs.
• Zest, not juice Half a teaspoon of lemon zest perfumes the eggs without adding liquid, so the custard stays as written.

Tips for making this recipe well

Snap, do not cut

Bend each spear and let the woody end snap off where it wants to. Knife-cut ends can leave fibrous sections in the finished squares.

Snip in the dish

Cut the roasted spears into 1 1/2-inch pieces right in the baking dish with kitchen scissors. Fewer dishes to wash, and the pieces settle into an even layer.

Barely jiggling is done

Pull the dish when the edges pull from the sides and the center moves only if you nudge it. It firms through during the 10-minute rest.

Built for the buffet

This dish is as good an hour out of the oven as it is hot. That quality is why it travels so well to potlucks and brunch tables.

Serving suggestions

Rest it 10 minutes, cut the slab into squares, and serve them warm or at room temperature; the dish was built to sit, so it suits brunch buffets and potluck tables as much as a sit-down breakfast. A little extra Parmesan and a grind of pepper on the squares right before serving sharpens the look. At 4 net carbs per serving, one 8x8 pan covers a small crowd generously.

Storage and meal prep

Leftovers keep 3 to 4 days covered in the refrigerator, and the squares reheat well in a low oven or taste fine cold, since the dish holds at room temperature anyway. The asparagus looks sharpest on day one, though nothing suffers much by day three. Freezing holds for 2 to 3 months; thaw overnight and warm gently, accepting a slightly softer set. Roasting the asparagus in the morning and baking at dinner splits the work neatly.

Variations worth trying

• Different green Roasted broccoli or green beans takes the asparagus's place in the same amount.
• Swap the soft cheese Goat cheese in the same spoonfuls turns tangier; mascarpone turns milder.
• Herb it A tablespoon of chopped chives or dill whisked into the eggs leans the flavor fresher.

Frequently asked questions

Can I assemble it the night before?

Roast the asparagus and hold it separately, then assemble and bake the next day. Fully assembled and refrigerated overnight, the dish bakes fine but may need a few extra minutes.

Why roast the asparagus first?

The hot roast blisters the tips and cooks off the water raw asparagus would otherwise release into the bake. It also concentrates the flavor of the stalks.

Can I use frozen asparagus?

Thaw it completely and dry it well, then roast as directed to drive off the water. Expect softer stalks than fresh gives you.

How do I know it is done?

The edges pull from the sides of the dish and the center barely jiggles when nudged. Egg dishes are fully cooked at 165°F if you want to confirm with a thermometer.

Does it really work at room temperature?

Yes, and the recipe itself calls for a 10-minute rest and calls it as good at room temperature. That quality is what makes it the potluck pick.

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