Preheat your oven to 375°F (190°C). While the oven is heating, use a brush or spray to lightly grease a muffin tin with olive oil.
If you’re using phyllo dough, layer 2-3 sheets together, brushing each layer lightly with olive oil. Cut the layered dough into squares that can fit into the muffin cups, forming little cups in the greased tin. For pre-made pastry shells, simply place them in the muffin tin, ready to be filled.
In a large mixing bowl, crack the eggs and add the milk. Whisk them together until they are fully blended and smooth.
To the egg mixture, add the diced bell peppers, chopped spinach, grated zucchini, halved cherry tomatoes, diced red onion, shredded cheese, dried oregano, salt, and pepper. Stir well until all the vegetables are evenly coated in the egg mixture.
Carefully pour the veggie-egg mixture into each prepared phyllo or pastry cup, filling them about 3/4 full to allow space for the eggs to rise while baking.
Place the muffin tin in the preheated oven and bake for 18-20 minutes, or until the eggs are fully set and the tops are golden and puffed.
Once baked, remove the muffin tin from the oven and allow the quiche cups to cool for a few minutes. Gently run a knife around the edges if necessary, then carefully lift the cups out of the tin.
Notes
Arrange the quiche cups on a vibrant serving platter, garnishing with fresh herbs for an elegant touch.