Step 1

In a large mixing bowl, whisk together the eggs, milk, heavy cream, cheddar, spinach, crushed red pepper, and salt.

Step 2

Line the inside bottom and sides of a 3-quart slow cooker with a large piece of parchment paper.

Step 3

Pour the egg mixture into the slow cooker.

Step 4

Place the lid on the slow cooker and cook on HIGH until the middle is set, about 3 hours.

Step 5

Grab the sides of the parchment paper and carefully lift the quiche up out of the slow cooker and onto a serving plate.

Step 6

Slice and serve.