Make the rosemary honey: in a small saucepan over medium heat, bring the honey, vinegar, soy sauce, rosemary and red pepper flakes to a simmer. Cook, stirring occasionally, until the mixture has slightly thickened and reduced to about 1/2 cup, 8 to 10 minutes. Remove and let cool before discarding the rosemary.
Preheat the over to 375. In a medium bowl, toss together the root vegetables, bacon, sugar and oil, then season with salt and pepper. Spread the seasoned roots and bacon out onto a sheet tray in one layer.
Roasted, turning the vegetables and bacon halfway through cooking, until the vegetables are caramelized and cooked through, 25 to 30 minutes.
Spoon the bacon and roasted roots onto a platter and drizzle them with some of the rosemary honey. Reserve the leftover honey for another use.