Step 1

Preheat oven to 325 degrees F (165 degrees C). Spray 36 mini muffin cups with cooking spray.

Step 2

Heat a large skillet over medium-high heat and crumble in sausage. Cook and stir until sausage is crumbly and evenly browned, about 10 minutes . Drain and discard any excess grease.

Step 3

Sprinkle sausage, Cheddar cheese, Swiss cheese, and green onion evenly into the prepared muffin cups.

Step 4

Beat eggs, potato flakes, and cream together in a bowl; season with salt and pepper. Pour egg mixture evenly over the sausage-cheese mixture in the muffin cups.

Step 5

Bake in the preheated oven until quiches are set in the middle and lightly browned, about 22 minutes. Cool for 5 minutes before serving.