Sauté the onions, carrots and peppers in the butter. Beat the eggs in a large bowl. Add the sour cream and corn muffin mix. Stir well. Add both cans of corn undrained. Add the sautéed vegetables. Stir until well mixed.
Pour into a Pam sprayed or greased 9x13 baking dish. Bake at 325°F to 350°F for 45 to 50 minutes. Do not overcook.
Note: I add a small can of green chilies to this for variety.