Preheat the oven to 180°C. In a medium sized saucepan with boiling water add the lentils and fava beans and cook for about 15 minutes until well cooked. Drain and let them cool.
In a food processor add the onion, cumin, vegetable powder and blend until onion is finely chopped. Add the lentils, fava, kidney beans, breadcrumbs, egg and coriander and pulse again until all ingredients are well combined. Add the peas and carrots to the mixture and mix gently. Transfer the mixture to a cake tin lined with baking paper and bake in the oven for about 50 minutes. Let it cool before cutting.