Step 1

Preheat the oven to 375 degrees.

Step 2

Rub the butter all over the bottom and up the sides of a 9X13 inch baking dish.

Step 3

Fry the sausage and onion together in a large skillet. This will take about 10 minutes, make sure there are no traces of pink left in the meat.

Step 4

In a large bowl, mix tater tots, sausage, and onion.

Step 5

In a separate bowl, beat eggs slightly, add milk, half and half, seasoning salt, pepper, garlic, cheddar cheese, pepper jack cheese, and half of the mozzarella cheese.

Step 6

Add this mixture to the tater tot and sausage mixture.

Step 7

Pour all of this into the buttered 9X13 inch baking dish.

Step 8

Bake for 45 minutes covered with tin foil, then remove foil and add the remaining mozzarella cheese.

Step 9

Bake for another 15 minutes uncovered.