Wash the sage, shake dry, pluck from the stems. Clean, wash and finely dice the peppers. Peel onion and 2 garlic cloves and cut into very fine cubes. Heat oil in a pan and fry sage leaves in it for about 1 minute and take them out. Sauté the bell pepper, garlic and onion in the sage oil for about 5 minutes
Pour the beans into a sieve and rinse with cold water. Add tomatoes and beans to the pan, bring to the boil and simmer for 10-15 minutes. Wash and clean the chillies and cut into fine rings. Season beans with salt and chilli. Peel 1 clove of garlic and press it through a garlic press. Mix yoghurt and garlic, season with salt and pepper
Bake bread in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 10 minutes until crispy. Clean, wash and halve the lettuce and cut into wide strips from the stalk. Crumble the sage slightly and season the beans with it
Cut the bread into quarters, cut horizontally up to the edge and open. Fill each bread quarter with 1/4 lettuce and beans. Add yoghurt to taste