Slow cooker burrito bowls

Name: Slow cooker burrito bowls
Ingredients: * 1 onion, diced or thinly sliced; * 1 bell pepper (i used yellow), diced; * 1 mild red chilli, finely chopped; * 400 g tin black bean, drained (240g, or ~ 1 1/4 cup, when drained); * 215 g uncooked brown rice (~ 1 cup); * 400 g tin chopped tomato (~ 1 1/2 cup); * 150 ml water (~ 1/2 cup); * 1 tbsp chipotle hot sauce; * 1 tsp smoked paprika; * 1/2 tsp ground cumin; * salt; * black pepper; * to serve, your choice of: grated cheese, fresh coriander (cilantro),