Sift 300 g plain flour into a large bowl. Add 1 tbsp of olive oil, 2 tbsp of baking powder and a pinch of salt. Mix and gradually add 200 ml of water. Mix the dough thoroughly. Divide it into halves and then into smaller parts, which you shape into the shape of buns. Place them on a tray lined with baking paper, drizzle with water or olive oil and sprinkle with a mixture of poppy seeds and sesame seeds. Bake for 20 minutes at 200 degrees. Cut the baked buns in half, spread them with vegan salad of your choice and cover them with vegetables. You can use cucumber, arugula and red onion. Serve with fresh herbs.