Cook the noodles according to package directions, drain and set aside.
Meanwhile, heat the olive and sesame oil in a large pan over medium heat.
Add the mushrooms, onion, bell pepper, and broccoli to the pan. Cook, stirring occasionally for about 5-6 minutes until tender.
Add the garlic to the pan and cook stirring constantly for 1 minute.,
Add the cooked lo mein to the pan along with the sauce and use tongs to stir and toss for 1 minute until combined and sauce is thickened.
In a small bowl or measuring cup, whisk together the broth, soy sauce, sesame oil, brown sugar, sriracha, and cornstarch until smooth.
