Mix the butter and brown sugar well, then stir in the soy sauce and garlic. Toss the beans in this mixture. Preheat the oven to 425F. Line a shallow baking tin with parchment paper and spread the beans evenly across the parchment. Top with the bacon. Bake at 425 degrees for 30-40 minutes or until bacon is well crisped. By this time the beans will be cooked. If you prefer crisper green beans, bake for 20-30 minutes, then remove from oven. Move the bacon to a baking sheet and crisp under the broiler before returning to the dish.