Preheat an oven to 350 degrees. Line a baking sheet with parchment.
Bring a large pot of water to boiling. Fill a large bowl with ice water; set aside.
Working in batches, carefully lower trimmed green beans into the boiling water, boil 2-4 minutes, drain and plunge into ice water to stop the cooking process; drain and pat dry.
In a large nonstick fry pan over medium heat, cook the bacon in batches until the slices are just beginning to brown along the edges. It should be soft not crisp, about 4 to 6 minutes. Transfer to a paper towel-lined plate and let cool, then cut each slice in half crosswise.
In a small bowl, whisk together the butter, salt and garlic.
Divide the green beans into 16 equal portions, about 5-6 beans each. Gather each portion into a neat bunch and wrap a half slice of bacon around the center to hold the beans together, secure with a toothpick.
Place the bundles on the prepared baking sheet with the loose ends of the bacon underneath. Sprinkle the brown sugar evenly over the bundles and drizzle with the butter mixture.
Roast until the bacon is cooked through and browned, 20 to 25 minutes. Let stand for 3 to 5 minutes. Transfer the green bean bundles to a warmed platter and serve immediately.