2 large ripe avocados
1 large garlic clove, finely chopped
½–1 lime, juice only
1 large brown onion, finely chopped
½ red onion, very finely chopped
2 x 400g tins black beans
400ml/14fl oz passata
1 tsp caster sugar
½ tsp ground cumin
2 tbsp light olive oil
1 tsp dried oregano
sea salt
½ tsp sweet smoked paprika
2 tbsp tomato purée
6 large soft flour tortillas