Shrimp Tostadas

In a small bowl, whisk together mayonnaise, lime juice, brown sugar and chile powder. Refrigerate.

Heat oven to 450°. Place 2 racks on each of 2 baking sheets. Place tortillas on racks and lightly spritz both sides with nonstick cooking spray. Bake at 450° for 5 to 7 minutes or until crisp. Remove tortillas from oven and reserve.

Heat broiler. Coat broiler pan with nonstick cooking spray. Season shrimp with salt and pepper and place on broiler pan. Broil for 2 minutes per side or until cooked through. Remove shrimp to a plate.

Spread top of each tortilla with about 1 tbsp of mayonnaise mixture. Top with equal amounts shrimp, lettuce, tomatoes, onion, cucumber and cilantro. Squeeze a wedge of lime over each. Serve with salsa and, if desired, sour cream on the side.