aunt marjorie's fiesta squash casserole

Ingredients For aunt marjorie's fiesta squash casserole

• FIRST LAYER
• 3 sm

  zucchini or yellow squash, diced
• 4

  eggs, beaten
• 1/4 c

  butter, melted
• 1 c

  parmesan cheese, grated
• salt and pepper to taste
• 1 Tbsp

  sugar
• 1/2 c

  minced onion
• SECOND LAYER
• 3 to 4 md

  sized tomatoes, sliced
• salt and pepper to taste
• THIRD LAYER
• 2 lg

  onions, sliced thinly
• 1 c

  sour cream
• 2 c

  sharp cheddar, grated
• 1/2 c

  mayonnaise