Butternut squash, sweet potato and chilli soup

YOU’LL NEED

■ 1 medium butternut squash, peeled and diced■ 2 sweet potatoes, peeled and■ 1 red onion, peeled and chopped■ 2 cloves of garlic, peeled and crushed■ 1 red chilli, chopped, including seeds■ Tip of tsp chilli flakes■ 1ltr vegetable stock, fresh or cubed■ ¼ tsp toasted coriander seeds■ ¼ tsp toasted cumin seeds■ Salt and freshly ground black pepper for seasoning