Warm Weather Potato Casserole Recipe

4 tablespoons butter

2 medium onions, halved and thinly sliced

2 cloves garlic, minced or pressed

8 medium tomatoes, chopped into 1/4 inch pieces

2 tablespoons fresh chopped parsley

2 teaspoons chopped fresh basil leaves

1 teaspoon chopped fresh oregano

1 1/2 teaspoons salt

1/2 teaspoon black pepper

2 1/2 pounds potatoes, sliced

1/8 inch thick

1 cup grated Swiss cheese or gruyere

2 tablespoons grated Parmesan cheese