Salad Pizza
["1/2 (17 1/2 oz.) pkg. frozen puffed pastry (1 sheet)", "3 c. torn, mixed greens (such as spinach, romaine and iceberg)", "6 cherry tomatoes, quartered", "1/2 c. sliced, pitted, ripe olives (optional)", "thin slices of green and/or red peppers", "sliced scallions", "1 (4 oz.) container semi-soft cheese with garlic and herbs or 1/2 c. soft-style cream cheese with chives and onion", "2 tsp. Dijon mustard", "1 or 2 Tbsp. milk", "2 c. shredded Mozzarella cheese"]
["Crust:", "Thaw pastry according to directions.", "On lightly floured surface, roll pastry into a 12-inch circle.", "Place on a large baking sheet.", "Use a fork to prick bottom.", "Bake at 375\u00b0 for 15 to 18 minutes.", "Pastry will shrink.", "Cool."]
["frozen puffed pastry", "tomatoes", "olives", "thin", "scallions", "garlic", "mustard", "milk", "Mozzarella cheese"]