Rinse the crab meat and drain well. Wash the dill and dab dry. Cut the dill tips into small pieces, except for a few for garnishing. Peel and finely chop garlic, halve lemon and cut one half into slices.
For the marinade, squeeze 1/2 lemon. Mix lemon juice, dill and garlic. Season with salt and pepper. Finally, beat in oil. Mix the crabs with the marinade and let it simmer in the fridge for about 15 minutes.
Wash the tomato, cut off the lid and hollow out the tomato. Clean, wash and pluck the lettuce into larger pieces. Remove crabs from the marinade. Collect the marinade. Fill tomato with shrimps. Arrange lettuce leaves on a plate.
Pour the marinade over the salad. Place the stuffed tomato on the lettuce leaves. Garnish with dill and lemon wedges. Serve with wholemeal bread.