Easy Mongolian Chicken Bowls

Ingredients

• 1 tsp brown sugar, packed
• 1/2 tsp cornstarch
• 2 tbsp soy sauce
• 2 garlic cloves, crushed
• 2 tsp oyster sauce
• 1/8 tsp ground black pepper
• 1 tbsp water
• 1lb chicken breasts, diced into bite-size pieces
• 1 tsp sesame oil
• 4 cups broccoli florets, chopped (approx. 1 crown)
• 1 cup white onion, diced (approx. 1 medium)
• 1/4 cup water
• 2 tsp green onion, sliced
• 2 tsp sesame seeds, for serving