Easy Tomato Pesto Tarts (with optional prosciutto) - A one-dish-two-ways appetizer recipe for vegetarians AND meat-eaters. Festive tarts with garlicky pesto, tangy tomato slices, and melty Parmesan atop buttery golden puff pastry squares. Vegetarian; but you can add salty prosciutto to individual tarts for the meat-eaters!
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