In a large skillet over medium heat, cook the chopped bacon until crispy.
Using a slotted spoon, transfer the bacon to a paper towel-lined plate. Measure and reserve 1/4 cup of the rendered bacon fat, discarding or saving any excess.
Return the reserved bacon fat to the skillet over medium heat. Add the minced shallots and sauté until softened and translucent.
Whisk in the apple cider vinegar, honey, and Dijon mustard. Continue whisking until the dressing is slightly thickened, creamy, and well combined.
Remove from the heat and season with kosher salt and freshly ground black pepper to taste.
Serve the dressing warm over your favorite salad, topping with the crispy bacon just before serving.
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Notes
Bacon: Thick-cut bacon works best for this recipe. Cook over medium heat to render the fat without burning.Bacon Drippings: You need 1/4 cup of rendered bacon fat. If your bacon doesn't yield enough, add a little neutral oil to reach the correct amount.Substitutions: Brown sugar, maple syrup, or granulated sugar can replace the honey, although the flavor may change. Champagne vinegar or red wine vinegar can replace the apple cider vinegar.Make Ahead: Prepare the dressing up to 5 days in advance. Store the crispy bacon separately to maintain its texture.Storage: Refrigerate in an airtight container for up to 5 days.Reheating: Gently warm in a saucepan over low heat, stirring until smooth, or microwave in 20-second intervals, stirring between each.Freezing: Not recommended, as the dressing may separate and change texture when thawed.Serving: Best served warm over spinach salad, kale, green beans, Brussels sprouts, or roasted potatoes. Add the crispy bacon just before serving.