Preheat the oven to 350°F. If using fresh beans, bring a pot of water with 1/2 teaspoon dry rub to a boil; add the beans and cook until crisp-tender, about 6 to 8 minutes. Drain and let cool until cool enough to handle.
Bundle approximately 6 freshly blanched or canned beans together, wrap with a half slice of bacon, and secure with a toothpick. Place the bundles in a 13 x 9-inch baking dish. (Can be prepared ahead of time. Refrigerate or freeze the bundles until ready to use.)
Sprinkle the bundles with garlic salt and remaining 1/2 teaspoon dry rub. Pour the melted butter over the bundles and then sprinkle with brown sugar. Bake until the bacon is done and the beans are warm, about 15 to 20 minutes.