Sweet and Garlicky Tofu Balls with Rich Sauce

Ingredients

• 1 tbsp vegetarian oyster sauce
• 1 tbsp Chinese black vinegar or rice vinegar
• 2 tbsp sugar
• 1/2 tbsp soy sauce
• 3 cloves garlic, minced
• 1/2 tbsp corn starch
• 1 tbsp water at room temperature
• 10 tofu balls or any plant-based meat alternatives you like
• 1/2 red bell pepper, deseeded and chopped into small pieces
• 1/2 small shallot or red onion, finely chopped
• 1 tbsp a neutral oil, like vegetable or canola
• 1 scallion, sliced (separate white and green parts)