Cook bacon to a crispy consistency. Once cooked, coarsely chop bacon on a chopping block.
Shave Brussels sprouts by removing the ends and processing them through a food processor with the slicing blade attachment on. Manually, keep the ends on and shave them through a mandolin, using the ends to grip the Brussels sprout. With a knife, slice the Brussel sprout in half and thinly chop it on a cutting board.
Place shaved Brussels sprouts in a large bowl with the sliced shallot. Top with crispy bacon.
Drizzle citrus vinaigrette over the top and toss to combine.