Whisk together marmalade, lemon juice and walnut oil; salt to taste. Add banana and sugar; set aside. Arrange fruit slices on individual plates and sprinkle with arils. Spoon banana vinaigrette on top of fruit. If desired, mix ricotta cheese and sour cream; dollop mixture on each plate. Serve this pomegranate recipe.
Vinaigrette:
Fruit Salad: