Vegan burritos

Name: Vegan burritos
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: Mexican, American, Latin American
Ingredients: 4 large or 8 small tortilla wraps; 2 large handfuls spinach leaves, shredded; 1 avocado, thinly sliced (optional); hot sauce, to serve; 1 tbsp oil; 1 garlic clove, crushed; 1 tbsp chipotle paste; 400g can chopped tomatoes; 400g black beans, drained; 1 bunch coriander, chopped; 250g wholegrain rice, cooked and drained; 1 lime, juiced; ½ red onion, very finely chopped; 50g hazelnuts, roughly chopped