Vegetarian chilli

Ingredients

• 500g sweet potatoes, cubed
• 1 tsp cayenne pepper
• 1 tsp cumin
• 1 tsp cinnamon
• Olive oil
• Salt
• ground black pepper
• 1 onion
• 1 red pepper
• 1 yellow pepper
• Bunch of coriander
• 1 red chilli
• 1 green chilli
• 2 cloves garlic
• 2 x 400g tins of beans (kidney, chickpea, pinto, butter or cannellini)
• 2 x 400g chopped tinned tomatoes