Easy Taco Pie
["1 lb. ground beef", "1/2 c. chopped onions", "1 envelope taco seasoning mix", "1 can (4 oz.) chopped green chilies, drained", "1 1/2 c. milk", "2 eggs", "1 c. biscuit baking mix", "1/2 c. Mozzarella cheese, shredded", "1 can Ro-Tel"]
["Heat oven to 400\u00b0.", "Grease 9 x 1 1/4-inch pie plate."]
["ground beef", "onions", "taco", "green chilies", "milk", "eggs", "biscuit baking mix", "Mozzarella cheese", "Ro-Tel"]