Wash the dill, shake dry and cut finely. Mix with milk and 200 g cream. Halve the garlic clove. Peel and wash the potatoes and slice them into thin slices.
Rub a large casserole dish (approx. 26 x 40 cm) with garlic, then grease. Layer potato slices in the dish, season with salt and nutmeg. Finally, pour cream on top until the potatoes are completely covered, possibly pour a little more cream on top.
Cook in the preheated oven (electric cooker: 225 °C/circulating air: 200 °C/gas: see manufacturer) for approx. 1 hour.
Wash the tomatoes, cut them in half. Wash salmon, dab dry and cut into 4 pieces. Season with salt and pepper. After about 45 minutes, spread the salmon and tomatoes on the potatoes. Cook everything ready.