Preheat oven to 425 degrees F.

Line a deep-dish pie plate with your own or a store-bought pie crust, set aside.

In a skillet over medium-high heat, brown pork sausage with onion, salt, and red pepper flakes.

When the meat is almost cooked, add in the green chilies. Remove from heat, placing on a paper towel-lined plate to drain grease.

In a bowl, whisk together eggs and half & half. Mix in chopped cilantro.

Sprinkle the flour into the bottom of the pie crust, spread the meat mixture into the bottom, top with shredded cheese.

Pour the egg mixture over the top. Bake for 15 minutes then reduce the oven temperature to 300 degrees F and continue baking for another 30 minutes.

Let the quiche rest for 10-15 minutes before slicing.

Garnish with sliced tomatoes, green onion, and additional cilantro if desired.