Combine 1 lb. fresh strawberries, sliced, with 2 cups fresh blueberries; sprinkle with 3 Tbsp. sugar, and toss. Let stand 10 minutes. Spoon evenly over 10 vanilla or chocolate miniature ice-cream sandwiches; dollop with 1⁄2 (8-oz.) container thawed whipped topping. Makes 10 servings.
Note: An additional pound of fresh strawberries, sliced, may be substituted for the blueberries.