To prepare salsa, combine the first 4 ingredients in a bowl; toss gently. Cover and chill.
Preheat oven to 45
To prepare blintzes, combine ricotta, sugar, and vanilla, stirring well. Spoon 2 tablespoons cheese mixture in center of each crepe; fold sides and ends over.
Place seam side down in a 13 x 9-inch baking dish coated with cooking spray.
Brush butter over crepes.
Bake at 450 for 6 minutes or until lightly browned.