This vegetarian quiche swaps the usual pastry for a crispy, golden potato crust that’s naturally gluten-free and adds a hearty, savory base to the creamy egg filling. It’s a flexible dish that works for breakfast, brunch, or a light dinner, and it comes together with simple ingredients you likely already have. The potato crust holds together beautifully when sliced, so you get a clean, satisfying piece every time.
Ingredients
- 2 large russet potatoes (about 1 lb / 450 g total), peeled and shredded
- 1 teaspoon salt, divided
- 2 tablespoons olive oil or melted butter
- 1 cup (120 g) shredded cheddar cheese, divided
- 6 large eggs
- 1 cup (240 ml) whole milk or half-and-half
- 1/2 teaspoon black pepper
- 1/4 teaspoon garlic powder
- 1 cup (150 g) chopped spinach (fresh or thawed frozen, squeezed dry)
- 1/2 cup (75 g) diced bell pepper (any color)
- 1/4 cup (40 g) chopped onion
- 1/2 cup (75 g) cherry tomatoes, halved (optional)
Instructions
- Preheat your oven to 375°F (190°C). Grease a 9-inch (23 cm) pie dish or a 9-inch tart pan with a removable bottom.
- Place the shredded potatoes in a clean kitchen towel and squeeze out as much liquid as possible. Transfer to a bowl and toss with 1/2 teaspoon of the salt and the olive oil or melted butter.
- Press the potato mixture evenly into the bottom and up the sides of the prepared dish, forming a crust about 1/4-inch thick. Make sure the edges are slightly higher than the rim of the dish to hold the filling.
- Bake the crust for 15 minutes, until it starts to set and lightly browns at the edges. Remove from the oven and let cool slightly while you prepare the filling.
- In a medium bowl, whisk the eggs, milk or half-and-half, remaining 1/2 teaspoon salt, black pepper, and garlic powder until well combined.
- Stir in 3/4 cup of the shredded cheddar cheese, the spinach, bell pepper, and onion. Pour the mixture into the pre-baked crust.
- If using cherry tomatoes, gently place them on top of the filling, cut side up. Sprinkle the remaining 1/4 cup cheese over the top.
- Bake for 35–40 minutes, until the center is set and a knife inserted near the middle comes out clean. The internal temperature should read 160°F (71°C) on an instant-read thermometer.
- Let the quiche rest for 10 minutes before slicing. This helps the filling set and makes cutting easier.
Tips
- Squeeze the potatoes well: Excess moisture in the shredded potatoes makes the crust soggy. Use a towel or cheesecloth and wring out as much liquid as you can before pressing into the dish.
- Don’t skip the pre-bake: Pre-baking the crust for 15 minutes ensures it gets crispy and doesn’t turn doughy under the wet filling.
- Use a glass or ceramic pie dish: These materials heat evenly and help the crust brown nicely. If using a metal pan, check for doneness 5 minutes earlier.
- Substitutions: Swap the cheddar for feta, goat cheese, or Swiss. Use any vegetables you like—broccoli, mushrooms, or zucchini work well. For a dairy-free version, use unsweetened plant milk and omit the cheese.
Serving Suggestions
Serve the quiche warm or at room temperature with a simple green salad dressed with lemon vinaigrette. It also pairs well with roasted potatoes, fresh fruit, or a light soup. For brunch, add a side of toast or a bagel.
Variations
- Mediterranean: Add crumbled feta, kalamata olives, and sun-dried tomatoes instead of the bell pepper and onion.
- Herb and Leek: Sauté one leek (white part only) in butter until soft, then add to the filling along with 1 tablespoon fresh thyme or chives.
- Spicy Southwest: Add 1/2 cup black beans, 1/4 cup corn, and a pinch of chili powder or cumin. Top with pepper jack cheese.
- Mushroom and Swiss: Sauté 1 cup sliced mushrooms until golden, then add to the filling with 1/2 cup shredded Swiss cheese.
Storage and Reheating
Store leftover quiche in an airtight container in the refrigerator for up to 4 days. To reheat, place a slice on a baking sheet and warm in a 350°F (175°C) oven for 10–12 minutes, or microwave on high for 1–2 minutes. The crust will soften in the microwave, so oven reheating is best if you want it crispy. You can also freeze the baked quiche for up to 2 months—wrap tightly in plastic wrap and foil, then thaw overnight in the fridge before reheating.
Frequently Asked Questions
Can I use sweet potatoes instead of russet? Yes, sweet potatoes work well, but they hold more moisture, so be extra thorough when squeezing out liquid. You may need to bake the crust a few minutes longer.
Why is my quiche watery? Watery quiche usually comes from vegetables that release moisture during baking. Make sure to squeeze thawed frozen spinach completely dry, and if using fresh mushrooms, sauté them first to remove excess liquid.
Can I make this ahead of time? Absolutely. Assemble the quiche completely, cover, and refrigerate for up to 24 hours before baking. Add about 10 minutes to the bake time if baking straight from the fridge.
Do I need to peel the potatoes? No, you can leave the skin on for extra texture and nutrients, but make sure to scrub them well. The crust will be slightly more rustic.
How do I know when the quiche is done? The center should be just set—not jiggly—and a knife inserted near the middle should come out clean. For food safety, the internal temperature should reach 160°F (71°C).
Can I use a store-bought crust instead? Yes, you can use a regular pie crust, but the potato crust is what makes this recipe unique. If using a pastry crust, pre-bake it according to the package instructions before adding the filling.