Healthy Lettuce Wraps

Name: Healthy Lettuce Wraps
Ingredients: 1 cup chopped pineapple; 1 tbsp finely chopped onion; 2 finely chopped green chillies; 2 tbsp coriander leaves; 1 tsp lemon juice; 1/4 tsp black pepper powder; to taste Salt; 3/4 cup chopped cucumber; 3/4 cup chopped tomato; 3/4 cup chopped mix bell peppers; 3 cup boiled kidney beans; 1 cup roasted corn kernels; 1 tbsp olive oil; 1 finely chopped onion; 1 tsp finely chopped garlic; 4 tbsp tomato sauce; 1/2 tsp oregano; 1/2 tsp black pepper powder; 1 tsp red chilli powder; 1 tsp roasted cumin powder; as per taste Salt; 12 lettuce leaves; 1 cup sour cream