Smoky black bean chilli

Name: Smoky black bean chilli
Ingredients: 1-2 tsp chipotle paste; 400g black beans or kidney beans, drained; small bunch coriander chopped; 4 (or more) tortilla bowls (we used Old El Paso Stand ’n’ Stuff); 1 avocado sliced; 1 lime juiced; soured cream to serve; grated cheddar to serve; 1 tbsp olive oil; 1 small onion finely chopped; 1 garlic clove crushed; ½ celery stick, finely sliced; 1 small carrot finely chopped; 500g beef mince 10% fat; 3 tbsp tomato & vegetable purée; 200ml passata; 50ml milk