Put the peppers, zucchini, tomatoes, carrots and onions in a saucepan, fry in oil and season with herbs from Provence. Squeeze the garlic, add the potatoes and fill up with enough stock to almost cover the vegetables. Cook for about 15-20 minutes, just until the potatoes are cooked, then season with the spices and lemon juice.
If you like, you can add a dash of cream (then the dish is no longer vegan) or fresh herbs to taste.