Preheat oven to 375 degrees and liberally spray 8 x 13" pan with cooking spray. I've tried butter and oil and they both leave most of my enchilada attached to the pan.
Cook sausage while breaking up with spatula; drain.
Lay tortillas on a work surface and fill with 1/4c sausage and generous pinch of cheese. Roll up and line in the pan.
Beat eggs with milk, salt and pepper and pour over the tortillas. Top with cheese.
Bake covered for 15 minutes; uncover, cook another 7-8 minutes until egg is set and tortillas begin to rise.
This is the base recipe, feel free to add or omit ingredients!
I prefer Jones sausage because it tastes good and is already out of casing, making this recipe even easier.