Soak the musir in water for 3 to 24 hours in the fridge. Drain, rinse in cold water, and pat dry. Inspect the soaked musir, cutting out any stems that remain hard after soaking, and chop finely. In a mixing bowl, combine the chopped musir with the yogurt, salt, pepper, and mint. Mix well. Add the garnish if you like and serve as an appetizer or an accompaniment.