Cut the salmon into fine cubes. Wash and chop the dill. Peel and chop the shallots. Mix salmon, half of the dill and shallots. Season with salt, pepper, 1 teaspoon of mustard and lemon juice.
Form into balls. For the sauce, mix 2 egg yolks and the remaining mustard. Fold in the oil little by little. Season with salt, pepper and vinegar. Stir in the remaining dill. Peel, wash and coarsely grate the potatoes.
Add the rest of the egg yolk. Season with salt, pepper and nutmeg. Fry in hot clarified butter to small buffers. Arrange buffers, salmon balls and sauce on plates. Serve garnished with salad leaves, lemon slices and radishes.