Wash the chicken fillets, dab dry and cut a pocket lengthwise. Wash the herbs, shake dry and pluck off the leaves. Chop the oregano leaves and set aside.
Cut mozzarella into 8 slices. Put whole herb leaves and 2 mozzarella slices in each chicken filet and pin them. Put them in a cold place. Wash and halve the tomatoes and season with salt and pepper.
Sprinkle with oregano and parmesan and place on aluminium foil or a grill tray. Sprinkle with 1-2 tablespoons of oil. Peel shallots and garlic. Dice shallots finely, press garlic through a garlic press.
Wash the chilli, cut lengthwise and remove the seeds. Chop the chilli. Heat 1 tbsp. oil in a small pot, sauté shallots and garlic in it. Add the chilli, orange juice and jam and bring to the boil.
Simmer at low heat for about 5 minutes. Mix starch and 1-2 tbsp. cold water, stir into the sauce and let simmer again for about 1 minute. Season to taste with soy sauce. Spread 1-2 oil on filled chicken fillets and season with salt and pepper.
Grill on the preheated grill for 10-12 minutes while turning. Place tomatoes on the aluminium foil on the grill and cook. Serve with orange sauce.