Bok Choy Tofu Stir Fry - Clean Green Simple

Ingredients

• 14 ounces extra-firm tofu (pressed and cubed)
• 1 tablespoon rice vinegar
• 1 teaspoon sesame oil
• 3 tablespoons low-sodium soy sauce (or tamari)
• 1/4 teaspoon chili flakes (optional)
• 1/2 teaspoon ground black pepper
• 6 tablespoons cornstarch
• 3 tablespoons cold water
• 1 bell pepper (deseeded and diced)
• 4 ounces shiitake mushrooms (sliced)
• 3 1/2 cups bok choy (baby or large, sliced)
• 2 cloves garlic (minced)
• Scallions (chopped, for serving)
• Sesame seeds
• Oil