Spray any 8x8 baking dish with non-stick spray and set aside.
In a medium bowl, combine the ground meat, salt and other spices, diced onions, and diced apples.
Beat the egg in a separate small bowl.
Pour the egg into the mixing bowl and gently mix the egg into the sausage mixture.
Pour the sausage mixture into the baking pan. Spray your fingers so that the mixture doesn’t stick to your fingers. Gently press it down so that it’s even in the pan.
Bake in the oven for approximately 35 minutes. The sausage should no longer be pink and completely cooked through.
You can slice and serve immediately, or let it cool and refrigerate for future meals.