Peel and finely dice the onions. Halve the pineapple lengthwise, then cut into eighths. Remove the stem, separate the flesh from the shell and cut into pieces.
Break the lobster crabs out of their shells, cut them in half lengthwise and pull out the intestines.
Take 2EL of the hot clear soup and let the saffron powder melt in it. Squeeze the lemon.
Heat 1 1/2l oil in a saucepan and sauté the onions and long grain rice until translucent. Pour in the wine and steam at low temperature for 5 minutes.
Add dissolved saffron, clear soup and juice of one lemon and cook for 25 min, stirring occasionally. Next, fold in the cold butter and season with cayenne pepper, maybe salt.
Brush a frying pan with 1/2EL oil and roast the lobster crabs in it until they curl. Season the crabs with cayenne pepper and remove from the frying pan.
Briefly toss the pineapple chunks in the frying pan, mix everything together with the long grain rice and garnish with lemon balm.