Begin by shredding the Brussels Sprouts using either a sharp knife or a food processor fitted with a thin slicing disc. Set aside.
In a large, deep skillet, cook the bacon until crispy. Leaving the drippings in the skillet, remove bacon from skillet to a paper-towel lined plate and allow to cool to the touch. When cool, chop and set aside.
Reduce heat to low and add the shallot to the bacon drippings; season with salt and pepper. Sauté, stirring, until soft, about 3 minutes. Add the shredded Brussels sprouts to the skillet and stir to coat well in the bacon drippings. Increase heat to medium-low and cook, stirring, for 5 minutes. Remove the Brussels sprouts to a large bowl.
Meanwhile, prepare the vinaigrette in a small bowl. Whisk together the balsamic, lemon juice and Dijon. While whisking, drizzle in the olive oil. Season with salt and pepper.
To the large bowl of Brussels sprouts, add the bacon and about half to a third of the vinaigrette; toss well to coat. Transfer the mixture to a serving platter.
Top the Brussels sprouts mixture with crumbled Gorgonzola, sliced pear and pecans, if using. Drizzle with remaining vinaigrette and serve.
*You can chop the pear and sprinkle it over the top instead of laying on slices. You can also toss the chopped pear with the sprouts.