Zucchini, Squash, and Corn Casserole

INGREDIENTS

cut into thick 4-inch-thick slices 1 1/2 pounds yellow squash

cut into thick 4-inch-thick slices 1 1/2 pounds zucchini

3 cups

Corn, fresh kernels

Garlic cloves

2 cups

Sweet onion

Eggs, large

1/2 cup

Mayonnaise

2 tsp

Black pepper, freshly ground

1 tsp

Table salt

1 1/2 cups

Breadcrumbs, soft fresh

1 cup

Asiago cheese

1/4 cup

Butter

1/2 cup

Sour cream

1 1/2 cups

White cheddar cheese