Stir-Fried Lemongrass Chicken

Ingredients

• 1 lb boneless, skinless chicken thighs
• 2 tsp cornstarch
• 1 tsp kosher salt
• 1/2 tsp freshly ground black pepper
• 1 tsp peanut oil
• 1/3 cup chicken stock
• 1 tbsp fish sauce
• 1/4 cup fresh lemongrass
• 1 tbsp garlic (about 3 to 5 cloves)
• 2 to 4 tsp jalapeño chilies
• 1 small yellow onion
• 1 tsp brown sugar
• 1 to 2 tbsp peanut oil