In medium bowl, mix remaining 1/2 cup mozzarella cheese, the Parmesan cheese, sandwich spread, green onions and basil. Spread over crust. Pat tomatoes dry with paper towels; arrange over cheese mixture. Sprinkle with pepper. Bake 30 to 35 minutes. Let stand 10 minutes. Remove tart from side of pan before serving. Garnish with additional chopped basil, if desired.