Three Tomato Tart
["pastry for a single crust pie", "3 Tbsp. grated Parmesan cheese", "2 egg whites", "1 c. low-fat Ricotta cheese", "2 garlic cloves, minced", "1 Tbsp. thyme", "2 large tomatoes, sliced", "5 yellow or cherry tomatoes, sliced", "2 red cherry tomatoes, sliced", "2 tsp. thyme", "1 Tbsp. olive oil"]
["Prepare pastry for single crust, place in a 10-inch tart pan. Trim pastry even with rim of pan.", "Do not prick.", "Line pastry shell with a double thickness of foil.", "Bake at 450\u00b0 for 5 minutes.", "Remove foil, bake 7 minutes or until done.", "Remove from oven.", "Reduce temperature to 325\u00b0."]
["pastry", "Parmesan cheese", "egg whites", "low-fat Ricotta cheese", "garlic", "thyme", "tomatoes", "tomatoes", "red cherry tomatoes", "thyme", "olive oil"]