Potato and Vegetable Gratin

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thinly slice the potatoes, zucchini, turnips and  sweet potatoes

place in a single layer on a baking tray (you'll need 3 trays) sprinkle with olive oil

season with salt, pepper, paprika, garlic powder and Italian seasoning

bake for 15 minutes at 400°F/ 200°C

to a bowl, add cream, Parmesan, Gruyère, salt, pepper, garlic powder, nutmeg & Italian seasoning

stir to combine

grease a baking dish with butter, add 3 tablespoons prepared cheese mixture

place pre-baked potatoes and vegetables upright

spread the  remaining mixture

cover with aluminum foil bake 20 minutes  at 400°F/ 200°C

remove foil, sprinkle with Gruyère, bake for  20 minutes more