For the minced meat mass, soak rolls in cold water. Peel and finely dice the onion. Squeeze the bread roll. Knead minced meat, mustard, onion, roll, 1 tsp salt and 1 tsp pepper. Divide the minced meat into eight pieces and form a slightly elongated meatball.
Clean and wash the cabbage, carefully cut off the 8 outer large leaves. Use the rest of the cabbage for other purposes. Cut the stalk on the back of the cabbage leaves flat. Turn over leaves. Place the meatballs at the stem end of each cabbage leaf, fold the sides tightly over and roll up firmly.
Stick together with about 2 wooden skewers each.
Heat the oil in a casserole, fry the rolls in it while turning. In the meantime, pour the pineapple into a sieve, collecting the juice. Deglaze rolls with pineapple juice and stock, bring to the boil, cover and braise over a low to medium heat for about 25 minutes.
Cut the pineapple into small pieces. Prepare rice in boiling salted water according to package instructions. Carefully lift the rolls out of the stock and remove the wooden skewers. Add Chinese sauce to the stock, bring to the boil.
Add pineapple and peas, bring to the boil and simmer for 3-4 minutes. Wash the coriander, shake dry and pluck the leaves from the stalks.
Stir starch and 2-3 tbsp. water until smooth, stir into the boiling sauce, bring to the boil and simmer for about 1 minute. Season with salt and pepper. Add the rolls to the sauce, heat briefly and sprinkle with coriander.
Arrange the rolls on a plate, possibly garnish with chilli pepper. Serve with rice.