INGREDIENTS
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Enough pastry for a 9"- or 9 1/2" deep-dish pie pan
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4 large ripe tomatoes
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Salt
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3 tablespoons unsalted butter
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2 large onions, halved and sliced
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3/4 cup mayonnaise
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1 1/2 cups grated sharp Cheddar cheese
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1/2 cup grated Parmesan cheese
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1/8 teaspoon ground black pepper
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1 1/2 tablespoons Italian style bread crumbs
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2 tablespoons pesto or 2 tablespoons chopped fresh basil