Peel the cucumbers, cut them in half lengthwise and scrape out the seeds. Cut the cucumbers into slices about 1 cm thick. Peel and chop onions. Peel ginger, grate finely. Clean the chilli, cut lengthwise, remove seeds, wash and chop finely.
Heat the oil in a large pot. Stir-fry the cucumbers and onions in it. Briefly sauté ginger, chilli, mustard seeds and 2 tsp. turmeric. Deglaze with coconut milk, bring to the boil. Add bay leaf and season with salt and pepper.
Cover and simmer for 8-10 minutes.
In the meantime, rinse and drain the crayfish meat. Wash and halve the tomatoes. Add both about 2 minutes before the end of the cooking time. Roughly chop the almonds. Season curry again, arrange and sprinkle with almonds.