Preheat oven to 375.

Add butter, onions, and peppers to a large skillet and saute for 2-3 minutes over medium heat.

Add ground sausage and beef. Cook for 5-7 minutes or until cooked through. Use a potato masher to crumble the meat.

Add taco seasoning, ½ t. salt and ¼ t. pepper. Stir to combine.

In a medium bowl combine salsa, corn, and black beans. Stir to combine.

Spray a 9 x 13 inch pan with non-stick cooking spray.

Layer half of the meat mixture, half of the salsa/corn mixture, 16 tortilla quarters, and 1 cup of cheese. Repeat all layers except for the last cheese layer.

In a large bowl combine eggs, ¼ c. milk, ½ t. salt and ¼ t. pepper. Whisk to combine.

Pour egg mixture over the layers and top with remaining cheese.

Bake for 45-55 minutes, or until middle stops jiggling.

Serve with cilantro, green onions, avocados and extra salsa.