Pork and Sweet Potato Stir Fry

In bowl, mix broth, soy sauce, ketchup, vinegar, cornstarch and red pepper flakes until smooth. Set aside.

Heat 1 tablespoon of the oil in a large nonstick skillet over medium-high heat. Add pork and stir-fry for 2 minutes. Season with salt. Remove to plate and keep warm.

Add remaining 1 tablespoon oil to skillet; sauté sweet potatoes and peppers over medium-high heat for 8 minutes. Add 1 cup water and simmer, covered, on medium-low for 6 minutes, until sweet potato is tender, stirring occasionally.

Stir in broth mixture and cooked pork and bring to a boil. Reduce heat and simmer for 1 minute, until sauce is thickened and meat is heated through. Serve immediately.