Cut the goat cheese taler crosswise into 4 slices. Spread the baguette with fat. Put 2 slices of goat's cheese on top of each baguette. Bake in the preheated oven (electric cooker: 225 ° C/ gas: level 4) until the cheese begins to brown.
Clean and wash the lettuce, put some lettuce leaves back for garnishing. Cut the rest into strips. Wash and chop the cucumber. Peel onion and cut into fine cubes. Wash, clean and quarter the tomatoes.
Mix vinegar, salt, pepper and sugar. Whip the oil into the mixture. Mix the salad ingredients with the marinade. Arrange salad leaves, baguette slices and salad on plates. Sprinkle cheese with thyme.