Wash lemons hot and cut into slices. Wash herbs and shake dry. Wash fish and pat dry. Season inside and out with salt and pepper.
Spread rosemary, parsley and lemons into the belly openings of the trout. Form a package of aluminium foil for each fish. Fold a piece of aluminium foil in the middle and fold the side edges twice. Pour 1 teaspoon of oil and 2-3 tablespoons of wine into each trout through the resulting opening. Fold the opening twice. Grill the packs on the hot grill for about 20 minutes.
Tip: Put each trout in a quickly folded aluminium packet, then sprinkle with oil and wine. This way nothing will run off the foil.