In a wok or large skillet, heat 1 tablespoon of olive oil over medium-high heat. Add in the bell pepper, peas, carrots, mushrooms, broccoli, baby corn, and water chestnuts. Sauté for about 2-3 minutes, or until the vegetables are almost tender.
In a separate small bowl, whisk together the soy sauce, minced garlic, brown sugar, sesame oil, vegetable broth, and cornstarch until well combined.
Pour the sauce over the sautéed vegetables. Continue cooking, stirring frequently, until the sauce has thickened to your liking. Garnish with chopped green onions and sesame seeds, if desired.
Enjoy!