1. Heat oil in a large high-sided skillet or Dutch oven over medium-high until shimmering. Add turkey and cook, stirring and breaking meat into small pieces, until no longer pink, about 5 minutes.
2. Add onion, bell pepper, and zucchini and cook, stirring often, until vegetables begin to soften, about 5 more minutes.
3. Add tomato sauce and water, then stir in brown sugar, vinegar, mustard, garlic powder, and 3/4 teaspoon salt and bring to a simmer. Reduce heat to low, cover, and simmer until mixture is slightly thickened, about 10 minutes.
4. Season with salt and pepper to taste, then serve on warmed hamburger buns.
Hannaford fresh Magazine, September-October 2022