Preheat oven to 400º F and lightly grease a 10-inch pie plate with butter or non-stick spray.
Spread ham out on the bottom of greased pie dish and top with onions and Swiss cheese.
In a large bowl, whisk together eggs, milk and biscuit mix, then season with salt, garlic powder, onion powder and pepper.
Pour egg mixture over ham, onions and cheese, then place pie dish in oven.
Bake for 35-40 minutes, or until top is golden brown and bubbly, and toothpick inserted in center comes out clean.
Remove from oven, then slice, serve and enjoy.
