Place 2 to 3 slices of bread on a cutting board, then use a rolling pin to flatten to the thickness of a thin pancake. Using a drinking glass as a cookie cutter, cut a round out of each piece of bread. Repeat for all 24 slices. Push rounds into 24 ungreased mini muffin cups.
Put butter in a microwave safe bowl and melt in microwave on HIGH 10 to 15 seconds. Using a pastry brush, coat bread with butter. Sprinkle with garlic powder. Bake until lightly browned, 6 to 8 minutes.
Meanwhile, put lettuce in a medium bowl and pour in salad dressing. Place toasted bread cups on a platter and fill each with 2 to 3 tablespoons of salad. Sprinkle with Parmesan cheese. Makes 24.
Recipe reprinted with permission from Jack Witherspoon’s Twist It Up (Chronicle Books, 2011).