Preheat oven to 400°F and lightly spray a 9x13" baking dish with cooking spray. Set aside.
Heat a large skillet over MED HIGH heat. Once hot, add sausage and cook about 5 minutes, crumbling as you cook, until sausage is no longer pink. Remove to a plate with a wooden spoon, reserving the grease.
Add onion to the skillet and cook about 3-4 minutes, stirring often, until onion is soft and starting to brown a bit at the edges. Add to the plate with the sausage.
To a large mixing bowl, add eggs and half and half. Whisk to combine well. Whisk in paprika, salt, pepper, and garlic powder. Set aside for a bit.
Add biscuits to the prepared baking dish. Mine fit in two rows of 4, but feel free to arrange yours however you'd like.
Top with cooked sausage and onion. Sprinkle both cheeses over the top.
Pour the egg mixture over the top, making sure to evenly disperse the liquid.
Bake in preheated oven for 25-30 minutes, or until golden brown and eggs are set.
Serve hot and enjoy.