Wash and clean the zucchini and then cut into slices. Peel and chop the garlic. Wash basil, pluck leaves from the stalks and chop. Cut ham into pieces
Heat the oil in a coated pan. Fry the zucchini in it at medium heat for about 10 minutes while stirring. Add garlic after about 5 minutes. Season with salt and pepper. Remove from heat and sprinkle with basil
Grate parmesan. Mix butter in pieces, flour and parmesan with your fingertips to crumbs
Put the zucchini and ham in an ovenproof dish and cover with the crumbled mixture. Sprinkle breadcrumbs over it. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 15 minutes until the crumbles are golden. Serve hot