Black Bean, Beet & Brazil Nut Burgers

Name: Black Bean, Beet & Brazil Nut Burgers
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Cuisine: American
Ingredients: 1 tbsp olive oil; 1 onion; 2 cloves garlic; 1 tsp cumin; ½ tsp cayenne pepper; ½ tsp paprika; 1 tbsp cocoa powder; 100g brazil nuts; 2 cooked beets, cut roughly; 2 x 400g tins black beans & rinsed; 5 tbsp porridge oats; 1 tbsp flax seeds; 1 tbsp veggie Worcestershire sauce (or soy sauce); 3 tbsp tomato puree; 1 tsp salt; A good grinding of black pepper