Clean, wash and drain the salads well. Cut radicchio into strips. Peel the mango and cut the flesh first from the stone and then into fine slices.
Core, wash and finely chop the chilli. Peel and chop the shallots. Mix vinegar, salt, pepper and 1 pinch of sugar. Fold in the oil. Stir in chilli and shallots.
Mix 2/3 vinaigrette with the salad. Arrange decoratively on plates with mango and goose breast. Drizzle the rest of the vinaigrette over the salad. Garnish with marjoram.