Spicy Black Bean Soup (20 Min)

Name: Spicy Black Bean Soup (20 Min)
Prep time: 7 min
Cook time: 13 min
Total time: 20 min
Cuisine: Mexican
Ingredients: 1 tsp olive oil; ½ onion; 2 cloves garlic; 1 bell pepper, red; 1.5 cups black beans, cooked ((~1 can, 15oz/425g)); 1.5 cups vegetable broth; 1 tbsp nutritional yeast; 2 sprigs cilantro/coriander, fresh; 1 tsp cumin, ground; ¼ tsp chili flakes ((be careful not to make it too hot!!)); 1 tbsp balsamic vinegar; ½ avocado; 1 oz cheddar cheese