Cheesy Squash Casserole

CHEESY SQUASH CASSEROLE

6        Cups Yellow Squash, diced

1        Large White Onion, chopped

4        Tbsp. Butter

1/4     Cup Mayonnaise (not salad dressing)

1/4     Cup Sour Cream

1/2     Cup Cheddar Cheese, grated

1/2     Cup Mozzarella Cheese, grated

1/2     Cup Gruyere Cheese, grated

1        Cup Seasoned Breadcrumbs

1/8     Tsp. Sea Salt

1/8     Tsp. Black Pepper

1/8     Tsp. Garlic Powder

Preheat oven to 375 degrees.  In a large saucepan, steam the squash until it is cooked; remove and set aside to drain thoroughly.  In a small saucepan, saute onion in butter until opaque.  In a large mixing bowl combine squash, onion, salt, pepper and garlic powder and blend well.  Pour mixture into a 9 x 13 glass dish, topping with breadcrumbs.  Bake for 20 minutes