Preheat the oven to 425 degrees. Grease a 10-inch deep pie plate or cast iron skillet evenly with a thin layer of olive oil or butter.

Scrub the potatoes, and peel them if desired. Grate the potatoes using a hand grater or food processor into a large bowl. Add the chopped onions or scallions and chopped sweet bell pepper. Season to taste with sea salt and fresh pepper.

Spread about ½ the potatoes in the bottom of the greased pan. Sprinkle the cheese and smoked meat evenly over the top. Add the remaining potatoes, pressing them firmly into the pan. Brush some olive oil or butter over the top. Bake until the underside is golden and the potatoes are tender, about 30 minutes.

To serve, loosen the edges of the Rösti with a thin knife or spatula. Shake the pan to be sure the cake is free, then invert onto a serving platter. Cut into wedges and serve. Makes 6 servings.