Preheat oven to 375°F (190°C).

Place the pre-made pie crust in a pie dish and set aside.

In a medium bowl, whisk together the eggs, milk, salt, and pepper.

Spread half of the Swiss cheese onto the bottom of the pie crust.

Layer the chopped spinach, diced tomatoes, and diced red bell pepper on top of the cheese.

Pour the egg mixture over the vegetables.

Sprinkle the remaining Swiss cheese on top.

Bake for 35 minutes, or until the quiche is set and golden brown on top.

Allow the quiche to cool for a few minutes before serving.

Enjoy!