Wash the potatoes and boil them in a covered saucepan of salted water for 25-30 minutes. Finely chop the bacon, then finely chop the onion.

Rinse the cooked potatoes in cold water, peel and cut them into 1 cm (1/2 in) thick slices. Rinse the shrimps or prawns in cold water and pat them dry.

Fry the bacon in a large frying pan until crisp, add the butter and allow it to melt. Fry the onion until golden, add the shrimps or prawns and potato and fry well, stirring frequently.

Beat the eggs with the soda water, a generous sprinkling of salt and the soy sauce, pour the mixture over the shrimps or prawns and potatoes, reduce the heat and cook slowly until the egg has set. Serve sprinkled with dill.

Serve with: fresh green salad.