Vegan Chilli

Name: Vegan Chilli
Prep time: 15 min
Total time: 15 min
Cuisine: Mexican, Latin American, American
Ingredients: 1 tbsp. olive oil; 2 peppers, diced; 1 onion, chopped; 2 stalks celery, diced; 3 cloves garlic, crushed; 2 tsp. chilli powder; 1 tsp. smoked paprika; 1 tsp. cumin; 1 tsp. dried oregano; salt; Freshly ground black pepper; 1 (350ml) bottle Mexican beer; 1 large sweet potato, cut into 1.5cm cubes; 1 (400g) can black beans, drained and rinsed; 1 (400g) can pinto beans, drained and rinsed; 2 (400g) tinned diced fire-roasted tomatoes; 480 mL vegetable stock; 1 avocado, sliced; Lime wedges; thinly sliced spring onions