Step 1

Preheat oven to 350 degrees and lightly grease a 13 x 9-inch baking dish.

Step 2

Melt butter in a skillet over medium heat. Add onion and cook until beginning to soften, about 3 to 4 minutes. Remove from heat.

Step 3

In a large bowl, mix together all ingredients (including onions), except Corn Flakes and melted butter.

Step 4

Transfer mixture to prepared baking dish.

Step 5

In a small bowl, mix together crushed Corn Flakes and melted butter. Sprinkle on top of casserole.

Step 6

Bake for 45 to 55 minutes.