In a large skillet, heat up a tbsp. of vegetable oil and add the diced pancetta in. Cook until they're starting to brown on the outside, about 5 minutes.
4 ounce diced pancetta
At this time, add in the shallots and cook until tender, about 2 minutes. Add the shaved brussel sprouts to the pan and stir around. Add the apple cider vinegar on top, as well as the salt and pepper.
1 large shallot, 1 pound shaved brussel sprouts, 2-3 tablespoons apple cider vinegar, Salt and pepper
Continue to cook down the brussel sprouts until they're soft and tender, about 10 minutes.