Wash the potatoes thoroughly and quarter them lengthwise. Mix with salt, pepper and 3 tablespoons of oil. Grease a fat pan of the oven with oil. Spread potatoes on top. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 30 minutes, turning potatoes occasionally.
Blanch the peas in boiling salted water for about 2 minutes. Remove and rinse with cold water. Clean and wash the cucumber and cut it into thin slices. Clean, wash and cut the bell peppers into fine strips.
Peel and finely dice the shallot. Vinegar and season to taste with salt, pepper and sugar. Add 3 tablespoons of oil drop by drop. Stir in diced shallots. Mix peas, cucumber slices and pepper strips with the vinaigrette.
Wash the meat, dab dry and possibly tap flatter. Season with salt and pepper. Wash sage, shake dry and pluck leaves from the stems. Cover cutlets with 1 slice of ham and 2-3 leaves of sage, fold them up and fix them with wooden skewers.
Heat 2 tablespoons of oil in a large, coated frying pan and fry Saltimbocca for 6-8 minutes while turning. Place the remaining sage leaves in the pan about 1 minute before the end of the cooking time. Season the vegetable salad with salt, pepper and sugar and arrange on a plate with the Saltimbocca.
Add the potato wedges.