Preheat oven to 400°.
Combine first 3 ingredients in a small bowl; mash with a fork until well blended and smooth.
Coat both sides of bread slices with cooking spray; rub each side of bread with garlic halves. Place bread in a single layer on a foil-lined baking sheet. Bake at 400° for 6 minutes or until lightly toasted. Turn slices over, and spread about 1 1/2 teaspoons cheese mixture on each slice. Bake at 400° for 5 minutes or until cheese mixture is warm.
While bruschetta bakes, heat marinara sauce and tomato paste in a small saucepan over medium heat. Spoon about 1 1/2 teaspoons sauce down center of each bruschetta; sprinkle with basil. Serve immediately.