1. Combine salsa and sour cream in a large bowl.
2. Heat oil in a large nonstick skillet over medium heat. Add onion and garlic and cook, stirring often, until softened, about 2 minutes. Add turkey and cook, stirring often and crumbling with a wooden spoon, until cooked through, about 5 minutes. Add tomatoes, beans, cumin and chili powder; cook, stirring, until the tomatoes begin to break down, 2 to 3 minutes. Remove from the heat, stir in cilantro and 1/4 cup of the salsa mixture.
3. Add lettuce to the remaining salsa mixture in the bowl; toss to coat. To serve, divide the lettuce among 4 plates, top with the turkey mixture and sprinkle with cheese.

Yield: 4 servings