1. Grilled banana split (277 calories) Slice an unpeeled banana lengthwise in half, leaving bottom peel intact. Stuff middle with 2 tablespoons dark chocolate chips and 1 tablespoon crushed pineapple. Wrap banana in foil and grill 3 to 4 minutes. Remove foil, place banana on a plate, and slice through. Top with ¼ cup strawberry sorbet and about 10 mini marshmallows. 
  2. Watermelon smoothie (229 calories) Combine 1 cup seedless watermelon chunks, 1 container (6 ounces) fat-free lemon yogurt, 1 teaspoon honey, and 4 ice cubes in a blender. Mix to a smooth texture and serve. (Check out these 10 other slimming smoothie recipes.)
  3. Crunchy frozen banana (227 calories) On a plate, roll a small, peeled banana in 1/2 cup fat-free vanilla yogurt (about half will stick), or spread ¼ cup of yogurt directly onto banana with a pastry brush. Sprinkle with 2 tablespoons whole oats and cover with wax paper. Chill in the freezer for at least 4 hours. Unwrap banana, discard paper, and eat immediately. MORE: This Chocolate Summer Dessert Is Only 77 Calories