Spicy Udon Noodle Stir Fry with Chinese Broccoli and Shiitake Mushrooms

Name: Spicy Udon Noodle Stir Fry with Chinese Broccoli and Shiitake Mushrooms
Ingredients: 2 tablespoons neutral oil (such as avocado or grape seed oil); 1 small bunch Chinese broccoli (approximately 6 stems, chopped); 8 ounces shiitake mushrooms (about 1 heaping cup, sliced); 4 cloves garlic (grated); 2 packs (8 ounces each fresh or frozen udon noodles); 1 Serrano chili (thinly sliced); 1/4 cup soy sauce; 1 tablespoon sugar (white or brown); 1 tablespoon toasted sesame oil; 2 teaspoons fish sauce; 2 teaspoons lime juice (about 1/2 a lime); 1/4 teaspoon white pepper