Combine first 2 ingredients in a bowl; toss gently. Spoon 1/4 cup banana-strawberry mixture into each of 4 (8 oz.) parfait glasses. Top each with 1/4 cup yogurt, 1 tablespooon granola, 1/4 cup banana-strawberry mixture, 1/4 cup yogurt, 1 tablespoon granola, and 1 strawberry.