Wash the potatoes thoroughly, peel and halve if necessary. Coat a baking tray with 1 tablespoon of oil. Spread the potatoes on top. Cut garlic in half and add. Sprinkle with 2-3 tablespoons of oil, season with salt.
Bake in the preheated oven (electric oven: 200 °C/circulating air: 175 °C/gas: level 3) for about 50 minutes.
In the meantime peel or clean and wash the vegetables. Cut carrots and beans into pieces, zucchini into slices. After 15 minutes cooking time add carrots, beans and zucchini to the potatoes.
Wash and chop the marjoram. Cut the tomatoes into quarters and bake them with the marjoram for the last 20 minutes. Season with salt and pepper. Serve. Squeeze the soft garlic out of its skin and serve with the vegetables.