Heat oven to 400°. Grease 10” quiche dish or pie plate.
Cook and stir beef and onion over medium heat until beef is brown; drain.
Stir in seasoning mix, spread in plate, sprinkle with chilies.
Beat milk, baking mix and eggs until smooth 15 seconds in blender. Pour into plate.
Bake 25 minutes.
Top with tomatoes and cheese.
Bake until knife inserted between edge comes out clean (maybe 8 – 10 minutes longer).
Serve with sour cream, chopped tomatoes and shredded lettuce if desired.