Roast the pine nuts in a pan without fat until golden brown and take them out. Crumble the feta. Mix with sour cream and honey.
Wash and halve the tomatoes. Wash lettuce and pat dry. Halve hearts or cut whole head into wedges. Wash parsley and chop finely. Mix with lemon juice, possibly 1 tbsp. water, salt, pepper and 1 tsp. sugar. Fold in the oil.
Arrange lettuce hearts on plates. Arrange tomatoes, feta cream and seeds on top. Drizzle lemon marinade over them.