Turkey meatballs

Name: Turkey meatballs
Ingredients: 4 tsp olive oil or sunflower oil; 1 onion, finely chopped; Sea salt and freshly ground black pepper; 2 garlic cloves, finely chopped; 1 tsp smoked paprika (sweet or hot variety, to taste); 2 tsp ground cumin; 2 tsp ground coriander; 400g/14oz turkey mince; ½ bunch fresh coriander, leaves only, finely chopped; 2 ripe tomatoes, seeds removed, chopped; 2 spring onions, finely sliced diagonally; 1 avocado, peeled, stone removed, chopped; 1 lime, juice and zest only; 1 green chilli, finely chopped; Drizzle olive oil; Lime wedges; Lettuce leaves