Preheat the oven to 400°F.
Mix one pound of ground sausage, one egg, one-third cup of green onion, two tablespoons each of almond flour, and Bisquick, and three tablespoons of parmesan cheese in a large bowl. Form into one-inch meatballs. Arrange the meatballs on a baking sheet and bake for twenty minutes or until done.
Reduce the oven temperature to 350°F.
Pour the croutons into the bottom of a casserole dish.
In a medium-size bowl, combine one-half cup of cream cheese, one-half cup of mayonnaise, one teaspoon of Italian seasoning, one teaspoon of garlic powder, and one-quarter of a teaspoon of red pepper. Mix until well and spoon the mixture over the top of the croutons.
Mix the Mozzarella and Parmesan cheese together and sprinkle half over the cream cheese mixture.
Combine one jar of marinara sauce and one-quarter cup of water in a bowl.
Add the meatballs to the casserole and pour the sauce over the top.
Sprinkle with the remaining cheese.
Bake uncovered in the preheated oven for thirty minutes or until the cheese has melted.
Let stand for fifteen minutes before serving.