How to Make It
Preheat oven to 400°.
Combine first 5 ingredients in a large bowl. Stir in the onion, broccoli, and muffin mix; stir until well blended. Pour into a 13 x 9-inch baking pan coated with cooking spray. Bake at 400° for 27 minutes or until set.
If you make this corn bread-type dish in a glass baking dish instead of a metal pan, decrease the oven temperature by 25 degrees.