In a skillet, cook the bacon over medium heat until crispy, about 5-7 minutes. Remove bacon and place on paper towels to drain. Crumble once cool.
Carefully pour the bacon drippings from the skillet into a heatproof bowl. Let cool slightly.
In a small bowl, whisk together the apple cider vinegar, Dijon mustard, and honey until smooth. Gradually whisk in the olive oil and warm bacon drippings until emulsified.
Stir in crumbled bacon, then season with salt and black pepper to taste.
Drizzle the bacon vinaigrette over salads, roasted vegetables, or even grilled meats for a smoky, savory touch.