Set the oven temperature to the recommended setting for pie crust preparation.
Roll out the pie crust and press it into a pie dish, trimming any excess crust from the edges.
Heat the olive oil in a pan over medium heat. When the onion is transparent, add the finely chopped onion and simmer.
Add diced bell pepper, chopped broccoli, and halved cherry tomatoes to the skillet. Vegetables should be sautéed until just soft.
Cook the young spinach in the skillet with chopped leaves until it wilts.
Spread the sautéed vegetables evenly over the pie crust. Sprinkle shredded cheddar cheese on top.
In a bowl, whisk together eggs, whole milk, salt, pepper, dried thyme (if using), and red pepper flakes (if using).
Pour the egg mixture over the vegetables and cheese in the pie crust.
Bake in the preheated oven until the quiche is set and the crust is golden brown, about 30-35 minutes.
Remove the Veggie Lovers Quiche from the oven and let it cool for a few minutes before slicing.
Serve the quiche warm, savoring the delightful combination of vegetables and cheesy goodness. Enjoy this flavorful and nutritious quiche as a satisfying meal!
