Clean, wash and cut the vegetables into pieces. Peel and finely dice garlic and onion. Heat the oil in an ovenproof pan. Sauté onion and garlic briefly. Steam vegetables for about 5 minutes, season.
Add olives. Grate cheese. Whisk with eggs. Pour over the vegetables. Let them stand in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 20 minutes. Garnish with a dash of crème fraîche and possibly herbs.