Keto Roasted Vegetable Quiche
A classic savory quiche featuring tender roasted zucchini, bell pepper, tomatoes, and onions nestled in a buttery shortcrust pastry shell, bound with a silky custard of eggs, cream, and melted cheddar. The vegetables are caramelized separately to concentrate their flavors before joining the creamy filling. Perfect for brunch, lunch, or light dinner entertaining. This version emphasizes the layered texture contrast between the crisp pastry base and moist vegetable-studded filling, ideal for serving at room temperature to a crowd.
Ingredients
- 1 lb shortcrust pastrypuff pastry1:1pastry swap
creates flakier crust, may need less initial baking
- ½ zucchini, diced
- ⅝ yellow bell pepper, diced
- 8 cherry tomatoes, halved
- 1 red onion, small, diced
- 2 tbsp olive oil
- salt, to taste
- black pepper, to taste
- 1 cup spinach, loosely packed
- 5 eggs
- ½ cup heavy cream
- ¾ cup whole milk
- 1 cup cheddar cheese, grated
Instructions
- 1
Preheat oven to 350F. Roll out pastry on floured surface and fit into 9-inch fluted pie or tart pan, pressing into base and sides. Trim excess dough flush with rim.
- 2
Prick pastry base all over with fork. Line with parchment paper and fill with baking beans or rice. Bake 15 minutes.
- 3
Remove beans and parchment. Bake 10 minutes more until lightly golden.
- 4
Increase oven temperature to 400F. Toss zucchini, bell pepper, tomatoes, and red onion with olive oil, salt, and pepper on baking sheet.
- 5
Roast vegetables 30 minutes until caramelized and tender.
- 6
Remove from oven and spread spinach over hot vegetables. Let stand a few minutes until wilted.
- 7
Whisk eggs, cream, milk, cheddar, salt, and pepper in bowl until combined.
- 8
Spread roasted vegetables and spinach in pastry shell. Pour egg mixture over top.
- 9
Bake 30 to 35 minutes until custard is set but still slightly jiggly in center.
- 10
Cool 15 minutes before turning out onto serving plate.
Tips
Pre-bake the crust fully to prevent a soggy bottom. The 25 minutes of baking ensures the base sets before the wet custard filling is added.
Roast vegetables at higher temperature to caramelize edges and concentrate sweetness. Spreading spinach on hot vegetables wilts them gently without adding extra cooking time.
Insert a knife into the center of the quiche at the end of baking. It should emerge clean with just a tiny amount of custard clinging to it, indicating perfect doneness.
Good to Know
Cover cooled quiche with plastic wrap and refrigerate up to 4 days. Reheat gently in 300F oven for 10-15 minutes.
Prepare and blind-bake pastry crust up to 1 day ahead. Roast vegetables up to 8 hours ahead and store in airtight container. Assemble and bake the morning of serving.
Serve at room temperature or slightly warm. Pairs well with simple green salad dressed with lemon vinaigrette and crusty bread.
Common Mistakes
Skip blind-baking to avoid soggy crust that remains doughy.
Roast vegetables at lower temperature to avoid dry, over-browned edges.
Overbake custard to avoid rubbery, cracked filling.
Substitutions
Dairy-Free Swaps
General Alternatives
FAQ
Can I make this quiche ahead?
Yes. Blind-bake the crust and roast vegetables separately up to 1 day ahead. Assemble and bake the morning of serving for best texture. Baked quiche keeps refrigerated 4 days and reheats well at 300F.
What if I don't have a tart pan?
A 9-inch round cake pan or pie dish works fine, though fluted sides won't be as defined. Adjust baking time slightly as depth may vary. Check doneness with a knife inserted off-center.
Can I freeze leftover quiche?
Yes. Cool completely, wrap tightly in plastic wrap and foil, and freeze up to 3 months. Thaw overnight in refrigerator. Reheat at 300F for 15-20 minutes until warmed through.