Mix the minced meat with the sour cream and roasted onions. Season the mixture with salt and pepper. Line a baking sheet with parchment paper. Put the mince on top and distribute. Slices of ham and cheese, then mushrooms, drained well, and parsley on top.
Roll up the mass from the long side. This works best if you use your thumb and palm as a guide rail. Finally, you can roll the roast nice and round with the parchment paper. Bake in the preheated oven at 200 ° C for about 20 minutes on the baking paper until the roast has a nice crust.
If you eat the meatloaf without a side dish, it is enough for 2, with a side dish for 4 people.