Five Spice Beef Stir Fry

Ingredients

• 1 pound beef (flank or skirt), chopped into ¼-1/2 inch thick strips
• ¼ cup soy sauce
• 2 Tbsp rice vinegar
• 2 tsp fresh ginger, minced
• 2 cloves garlic, minced
• 1 tsp sugar
• 1/4 tsp kosher salt
• ½ Tbsp Piquant Post Chinese Five Spice
• ¼ tsp red pepper flakes, optional
• 2 Tbsp vegetable or olive oil
• 3 bundles of baby bok choy
• 1 red bell pepper, de-seeded and sliced
• 1 tsp cornstarch or tapioca starch
• 2 tsp toasted sesame seeds, optional
• Cooked jasmine rice, for serving, optional