Soak the beans in plenty of water the day before. Rinse beans the next day. Cover and cook in plenty of boiling water for about 1 hour until they are soft. Drain the beans, rinse with cold water, drain and let them cool down.
Bring 200 ml salted water to the boil, stir in the couscous. Remove from the heat and let it swell for about 5 minutes. Loosen the couscous with a fork and let it cool down.
Peel the mango, remove the flesh from the stone and cut into cubes. Clean, wash and chop the peppers. Peel onion and cut into fine strips.
Wash and dry organic limes in hot water. Rub the skin off 1 organic lime, cut the other organic lime into slices. Squeeze 3 limes. Mix juice, peel, 2 teaspoons of sugar, salt and cayenne pepper, fold in the oil. Wash the coriander, shake dry and chop coarsely. Mix all ingredients and serve. Garnish with slices of lime. Roasted wheat tortillas taste great with it.