Step 1

Preheat oven to 375 degrees. Grease a 2 quart baking dish with butter. Set aside.

Step 2

In a large sauté pan over medium heat, add the breakfast sausage. Sauté the sausage and break it up into little pieces as it cooks. Continue cooking for 8 to 10 minutes. The sausage should be browned and crispy in spots and cooked through. Stir in the spinach and sauté until wilted. Remove from pan to a bowl and set aside.

Step 3

In a large bowl, add the eggs and whisk until combined. Whisk in the milk, mustard, baking powder, salt and pepper until thoroughly combined.

Step 4

Stir in the cooked sausage, spinach and cheddar cheese.

Step 5

Pour the mixture into the prepared baking dish.

Step 6

Bake for 25 to 30 minutes or until the center is just set.

Step 7

Serve warm or at room temperature.