• 4 tablespoons grapeseed oil, divided
• 1 large white onion, diced
• 4 carrots, peeled and diced
• 4 ounces shiitake mushrooms, thinly sliced, with stems removed
• 2 tablespoons ginger, minced
• 4 cloves garlic, minced
• 4 boneless chicken thighs
• Coarse ground black pepper
• 28 ounces ramen noodles