In a large bowl, whisk egg substitute and milk. Stir in the potatoes, 1 cup cheese, onion, 2 tablespoons bacon, salt, seasoning blend and chili powder. Pour into an 8-in. square baking dish coated with cooking spray.
Bake at 350° for 45-50 minutes or until a knife inserted in the center comes out clean. Sprinkle with remaining cheese and bacon. Bake 3-5 minutes longer or until cheese is melted. Sprinkle with green onions. Let stand for 5 minutes before cutting.