Easy Vegetarian Tomato Casserole

By birgit

5.0 / 5

10min

35min

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¼ cup butter
⅓ cup onion chopped
2 tablespoons finely chopped flat-leaf parsley
1 ¾ pounds tomatoes sliced
to taste salt
1 ¼ cups grated Parmesan cheese divided
9 ounces sour cream
2 eggs