 The ground spice paste is stir fried briefly in palm oil to release its aroma, together with chopped onion, "salam" leaf (Indonesian bay leaf) and lemon leaf.Then the crab pieces are mixed with stir fried spice paste together with crab broth, scallion, tomato ketchup, chili sauce, oyster sauce, salt and pepper.Then the sauce is being thickened with beaten eggs.