Cooked Vegetables in Foil
For the vegetables, peel and rinse the potatoes and cut into thin slices. Rinse and trim the zucchini, cut in half lengthwise and cut into slices. Trim the mushrooms and cut in half.
Rinse the tomatoes and cut into wedges.
Peel and chop the onion.
Season the vegetables with salt and pepper and drizzle with the oil and lemon juice.
To cook, drizzle 2 pieces of tinfoil about 30 x 20 cm (approximately 8 x 12 inches) with oil on the shiny side. Distribute the vegetables on them and fold the foil over. Seal the ends firmly and cook on a grill or in a preheated oven at 200°C (approximately 400ºF) for 25 - 30 minutes.