Heat oven to 400°F. Spread beef and onion in bottom of lightly greased, 9-inch pie plate; sprinkle salt, chilies, and cheese over cooked ground beef.
In a separate mixing bowl, stir remaining ingredients together until well blended. Pour egg mixture into pie plate.
Bake 25 minutes or until bubbly.
Add Montreal Steak Seasoning for a punch of garlic and black pepper, or serve it with salsa, sour cream, and fresh cilantro for a southwestern flavor. I like to play around with various cheese for variety; Monterey Jack or Irish cheddar would give completely different flavors.