Step 1

Preheat the oven to 375 F. Add 1 tablespoon of butter to the cast iron skillet and place it in the oven.

Step 2

In a large bowl, whisk together the eggs, heavy cream, and salt until fluffy. Add shredded Cheddar cheese and stir to combine.

Step 3

Using an oven mitt, remove the cast iron skillet from the oven and roll it carefully from side to side to evenly butter the dish with melted butter.

Step 4

Add chopped broccoli and chopped ham to a buttered cast iron skillet.

Step 5

Pour the egg and cheddar cheese mixture over the broccoli and ham.

Step 6

Top evenly with shredded pepper jack cheese.

Step 7

Bake for 20 minutes until the frittata is no longer wobbly in the center.

Step 8

Transfer the frittata to a wire rack, and let it rest for 15 minutes before serving.