Spinach and Mushroom Crustless Quiche

$5.89 recipe / $0.98 serving
by Beth - Budget Bytes
4.84 from 262 votes
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I’m a big fan of savory breakfast dishes, and this Spinach and Mushroom Crustless Quiche might be my new favorite! It’s very filling, full of vegetables, and doesn’t leave me with a carb hangover (I’m looking at you, pancakes). You can serve it up at brunch or eat it for lunch or dinner, so give this recipe for crustless quiche a try the next time you want to prepare something special. I promise it’s worth the effort!

Close up overhead view of a spinach and mushroom crustless quiche in a pie dish

What is Crustless Quiche?

Isn’t a “crustless quiche” just a frittata? Nope! While they are both baked egg dishes, there are distinct differences. The main difference is the texture. Quiches are a custard made with egg, cheese, and milk or cream. They have a soft, delicate texture. Frittatas, on the other hand, contain little to no milk or cream, so it is closer in texture to an omelet or baked egg. The other significant difference comes in the cooking process. Frittatas start on the stovetop and only finish for the last few minutes in the oven. Quiches are baked in the oven only.

Can this crustless quiche be reheated?

Yes, this crustless quiche recipe is one of my favorite make-ahead breakfast dishes! But you do need to be cautious while reheating because overheating can cause the egg proteins to seize up, expel water, and become rubbery. For that reason, I suggest reheating in the microwave only until the crustless quiche is warmed through but not piping hot. This will store in the refrigerator for about 4 days.

Can You Freeze Quiche?

Egg dishes like crustless quiche freeze just so-so. This is one of those grey areas where it will depend a lot on how sensitive you are to texture changes. The egg in the crustless quiche will seep a little water upon freezing, thawing, and reheating, which may or may not bother you. I suggest testing this with one piece of the spinach crustless quiche first to see if the changes are acceptable to you. To freeze, cool the quiche in the refrigerator first, then wrap tightly in plastic and transfer to the freezer. Thaw in the refrigerator overnight before reheating.

Love this no crust quiche? Try my Bacon Broccoli Cheddar Crustless Quiche, too!

A slice of crustless quiche being held in front of the pie dish on a spatula
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Spinach Mushroom and Feta Crustless Quiche

4.84 from 262 votes
This easy, tasty Spinach Mushroom and Feta Crustless Quiche is low on carbs and big on flavor. This veggie-filled breakfast will keep you full and happy.
close up view of sliced spinach and mushroom crustless quiche in the pie dish
Servings 6 slices
Prep 15 minutes
Cook 50 minutes
Total 1 hour 5 minutes

Ingredients

  • 1 10oz. box frozen chopped spinach ($1.00)
  • 8 oz. mushrooms ($1.49)
  • 1 clove garlic, minced ($0.08)
  • 1/8 tsp Salt ($0.01)
  • 1 Tbsp cooking oil, divided ($0.04)
  • 2 oz. feta cheese ($1.10)
  • 4 large eggs ($0.83)
  • 1/4 cup grated Parmesan ($0.44)
  • 1/4 tsp pepper ($0.02)
  • 1 cup milk ($0.42)
  • 1/2 cup shredded mozzarella ($0.46)
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Instructions 

  • Preheat the oven to 350ºF. Thaw and squeeze as much moisture out the spinach as possible.
  • Rinse any dirt or debris from the mushrooms, then slice thinly. Mince the garlic.
  • Add the mushrooms, garlic, salt, and a ½ Tbsp cooking oil to a skillet. Sauté the mushrooms over medium heat until they have released all of their moisture and it has evaporated from the skillet. No water should remain in the skillet.
  • Brush the other ½ Tbsp cooking oil inside a 9-inch pie plate. Layer the mushrooms, spinach, and crumbled feta into the pie plate.
  • In a large bowl, whisk together the eggs, Parmesan, pepper, and milk.
  • Pour the egg mixture into the pie plate over the spinach, mushrooms, and feta. Top with the shredded mozzarella.
  • Bake the crustless quiche in the preheated 350ºF oven for about 50 minutes, or until it is golden brown on top and the internal temperature reaches 160ºF. Slice and enjoy!

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Nutrition

Serving: 1sliceCalories: 187kcalCarbohydrates: 6gProtein: 13gFat: 13gSodium: 378mgFiber: 2g
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Video

How to Make Spinach and Mushroom Crustless Quiche – Step by Step Photos

thawed and squeezed spinach in a bowl

Preheat the oven to 350ºF. Thaw one 10oz. block of frozen chopped spinach (I use the microwave), then squeeze out as much of the moisture as possible. The spinach should be fairly dry after squeezing, no water remaining in the bottom of the bowl.

sliced mushrooms on a cutting board

Slice 8oz. of mushrooms and mince one clove of garlic.

Sautéed mushrooms in a skillet

Add the mushrooms to a skillet with ½ Tbsp cooking oil, one clove of minced garlic, and ⅛ tsp salt. Sauté the mushrooms until they release all of their moisture and it has evaporated off the bottom of the skillet.

Layered mushrooms, spinach, and feta in a pie dish

Brush another ½ Tbsp cooking oil over the inside surface of a 9″ pie dish. Layer in the sautéed mushrooms, squeeze-dried spinach, and 2oz. crumbled feta.

Milk being poured into a bowl with eggs, Parmesan, and pepper

Next, make the savory custard. Whisk together 4 large eggs, ¼ cup grated Parmesan, 1 cup milk, and ¼ tsp pepper.

custard mixture being poured into the pie dish

Pour the custard mixture into the pie dish over the spinach, mushrooms and feat. Sometimes I like to use a larger baking tray to transport my pie plate in and out of the oven. I feel like it makes it a little easier to do without spilling, but that’s up to you.

unbaked quiche topped with grated mozzarella

Top the unbaked quiche with a little shredded mozzarella. You don’t need much, I only used about ½ cup or ¼ off an 8oz. block.

baked spinach and mushroom quiche

Bake the quiche in the preheated 350ºF oven for about 50 minutes, or until it’s golden brown on top or until the internal temperature reaches 160ºF.

close up view of sliced spinach and mushroom crustless quiche in the pie dish

Slice and serve warm!

Spinach and Mushroom Crustless Quiche is a great low carb breakfast or brunch tread packed with vegetables and protein. BudgetBytes.com

(old photo from 2011 😊)

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Comments

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  1. What other cheese can I use other than mozzarella?
    Recipe sounds delicious! I want to make it for our after church brunch on Easter.
    Thanks!

    1. Any melty shredded cheese would be fine. Monterey Jack would work well!

    1. We’ve only used dairy milk to make it, however another reader said that she used 1/2 cup Kite Hill cream cheese, 1/2 cup oat milk, and Follow Your Heart dairy-free feta!

    1. We don’t usually go through the freezing process with most of the recipes, so I can’t give you a concrete answer there. Typically, quiches freeze pretty well for up to a couple of months, but it depends on your freezer along with a myriad of other factors. :)

  2. Could I use fresh spinach and wilt it down with the sauté mushroom mixture ?
    Would that work okay ?

  3. This crustless quiche is without a doubt, my best ever. It goes down perfectly every time and Budget Bytes needs a medal. Quantities per ingredient absolutely spot on. Have been making it fr many moons.