Prepare all your vegetables before starting to cook. Washing, trimming, and cutting them to similar sizes ensures even cooking.
In a small bowl, whisk together soy sauce, rice vinegar, honey, and cornstarch slurry. Set aside.
Heat 2 tablespoons of vegetable oil in a large wok or skillet over high heat until it begins to shimmer.
Add ginger and garlic, stir-frying for 30 seconds until fragrant but not browned.
Add onions and stir-fry for 1 minute until they begin to soften.
Add the harder vegetables first: carrots and broccoli. Stir-fry for 2-3 minutes.
Add green beans, bell peppers, and mushrooms. Continue stir-frying for 2 minutes.
Add snow peas last, as they cook quickly. Stir-fry for 1 minute.
Pour the sauce mixture over the vegetables and toss to coat evenly.
Cook for an additional 1-2 minutes until the sauce thickens and vegetables are crisp-tender.
Remove from heat and sprinkle with sesame seeds and sliced green onions.
Serve immediately over steamed rice or noodles if desired.