Knead a lokkeren yeast dough from flour, yeast, 150 ml lukewarm water and salt. Cover and leave to rise in a warm place for about 30 minutes. Knead again strongly and form two flat cakes.
Carve in the shape of a rhombus, brush with some water and sprinkle sesame seeds over it. Bake in the preheated oven (electric: 200 °C/ gas: level 3) for 15-20 minutes. Clean and wash the vegetables. Chop the salad and cut the peppers into strips.
Grate the zucchini. Cut cheese into slices. Mix salt, pepper, lemon juice and oil into a vinaigrette. Mix in the herbs. Cut flat bread in half. Spread 2/3 of the vinaigrette on the bottom half.
Fill breads with vegetables and cheese. Add the rest of the sauce.