In a bowl combine together broth, brown sugar, sesame oil and soy sauce. Whisk until everything comes together. Set aside.
Lo Mein
In a preheated skillet with oil, fry carrots until golden brown. Remove and set aside. Repeat this with onions, broccoli and bell peppers. Cooking veggies separately creates the best flavors.
Add all vegetables back to the skillet. Press garlic into the vegetables and toss everything together.
Add lo mein noodles and sauce. Toss together and let lo mein cook for 3-5 minutes.