Wash the matie fillets (water depending on salt content) and dab dry. Cut the fillets into pieces. Clean, wash and drain the salad and pluck into bite-sized pieces. Clean mushrooms, cut into slices and arrange on plates.
For the vinaigrette, drain the cranberries. Mix balsamic vinegar, white wine vinegar, 3-4 tablespoons cranberry juice, mustard, salt and pepper. Whip the oil into the vinaigrette. Clean and wash spring onion and cut into fine rings.
Add to the vinaigrette with cranberries. Spread over the salad and serve with strong, fresh bread.