Preheat oven to 375 degrees F. Spray a 2-quart casserole dish with cooking spray and set aside.
Set a large skillet over medium-high heat. Cook the sausage until no longer pink, then add the onion and bell pepper. Sauté for 3-4 minutes until softened.
Spread the cooked mixture in an even layer on the bottom of the prepared baking dish.
Whisk the eggs and heavy cream together in a small bowl. Season with salt, pepper, red pepper flakes. Pour the egg mixture over the sausage and veggies.
Sprinkle with shredded cheese and bake for 25-30 minutes, or until the eggs have set and the cheese is golden and bubbly.
Remove from the oven and allow to cool before serving.
Video
Notes
To make this recipe ahead, you can cook the entire recipe and then reheat when ready to serve at 350F for about 20 minutes.
Alternately, Cook the recipe through step three and then place it in the fridge, When you're ready to bake the casserole, prepare the egg mixture and complete the recipe.
Leftovers reheat well in the microwave.
Feel free to add other cooked vegetables, cooked meats, or cheeses to switch up the flavors in your casserole.