Veggie Loaded Chow Mein

Name: Veggie Loaded Chow Mein
Ingredients: 11.2 oz. yakisoba noodles (I use two 5.6 ounce packages* of yakisoba noodles, seasoning packets discarded); 1/4 cup low sodium soy sauce; 1 teaspoon dark soy sauce (optional, for color); 2 cloves garlic, minced; 2 teaspoons brown sugar; 1/2 cup water; 1 teaspoon rice vinegar; 1 teaspoon Sriracha; 2 teaspoons sesame or vegetable oil; 4 ounces brown mushrooms, sliced; 2 cups broccoli florets; 2 large carrots, cut into matchsticks; 2 cups shredded green or purple cabbage; 4 scallions, sliced; 1 tablespoon sesame seeds (optional, for garnish)