Healthy chicken burritos

Name: Healthy chicken burritos
Ingredients: 2 tsp rapeseed oil; 1 large red pepper, halved lengthways, deseeded and cut into thick strips; 1 tsp cumin seeds; 2-3 tsp mild chilli powder, to taste; 400g can black beans; 198g can sweetcorn, drained; 1 tbsp tomato purée; 1 large garlic clove, finely grated; 220g pouch cooked wholegrain rice (or leftover cooked brown rice); 300g cooked chicken, sliced or shredded (or a combination of leg and breast meat left over from a roast); 15g coriander, chopped; 2 small avocados, stoned and quartered; 1 lime, juiced; 4 large wholemeal tortilla wraps