Lighter Coronation chicken avocado sandwich

Name: Lighter Coronation chicken & avocado sandwich
Ingredients: 3 tbsp fat-free Greek yogurt; 1 tbsp mild curry powder; 4 dried apricots chopped; small bunch coriander chopped; 1 red chilli chopped (optional); juice 1 lime; 100g cooked chicken chopped into small pieces; 1 avocado; 4 slices rye or sourdough bread; 160g pack ready-chopped mango sliced; 1 Little Gem lettuce