Peel the potatoes cut into thin roundels. Zucchini wash, cut in half lengthwise, one half cut, the second to grate. Onion peeled and cut into segments. From apples to remove the seed pods, Apple cut into wedges. Put all in container, except the grated zucchini, add 2 tbsp of vegetable oil, add your favorite spices - I have this Provencal herbs, salt, pepper and mix well.

Cut fish fillets into large chunks.

Form brush with remaining butter and arrange the fish, vegetables and apples - I laid out rows: the number of fish, some potatoes, some apples, etc., in addition to the bow - the bow I took from the top, as if covered.

Yogurt mixed with grated zucchini, add salt, sugar, pepper - adjust according to your taste. Distribute the yogurt filling on top, especially coat the fish.

Oven heated to 200 degrees - be guided by your oven. Bake for 30-35 minutes - do not overdry it!. Serve immediately