Preheat the oven to 375 degrees and line a baking sheet with parchment paper.
In a large bowl, combine the ground beef, breadcrumbs, egg, onion, garlic, 1 tablespoon Dijon mustard, salt, and pepper. Mix gently until the ingredients are evenly distributed.
Shape the mixture into a loaf about 8 inches long and place it on the prepared baking sheet.
Lay the bacon slices over the top and sides of the loaf, tucking the ends underneath to secure them.
In a small bowl, stir together the brown sugar and remaining 1 tablespoon Dijon mustard until smooth. Spread this mixture evenly over the bacon-wrapped loaf.
Bake for 50 to 60 minutes until the internal temperature reaches 160 degrees and the bacon looks crisp. Let the meatloaf rest for 10 minutes before slicing.