Preheat the oven to 350°F. In a mixing bowl, combine the ground beef, breadcrumbs, egg, 1/4 cup brown sugar, onion, garlic, salt, pepper, and 1/4 cup peach preserves.
Mix the ingredients until evenly combined, then shape the mixture into a loaf and place it in a loaf pan.
In a small bowl, stir together the remaining 1/4 cup peach preserves, barbecue sauce, and 2 tablespoons brown sugar to make the glaze.
Spread the glaze evenly over the top of the meatloaf.
Bake for 60 minutes, or until the internal temperature reaches 160°F.
Remove from the oven and let the meatloaf rest for 5 minutes before slicing.