Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray or olive oil.
Add turkey, pepper, and salt to pan; cook for 3 minutes, stirring to crumble.
Stir in onion and all ingredients (through green olives); cook for 3-4 minutes or until turkey is done. Season with salt and pepper.
Cut lettuce in half and break off leaves.
To serve: Spoon 1/4 cup turkey mixture (or more) into each lettuce leaf and squeeze fresh lemon or lime juice on top