Gatherthe ingredients. The Spruce / Wanda Abraham. Preheat the oven to 350 F. Peel and cut the potatoes into thin slices (1/8-inch thick). Peel and thinly slice the onion. The Spruce / Wanda Abraham. Cut the bacon or pancetta lengthwise in strips and lightly fry them in a medium-high pan. The Spruce / Wanda Abraham.
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patatas gratinadas con queso y bacon al horno
