Combine broccoli florets, bok choy, sugar snap peas, red bell pepper, red onion, baby carrots, and water chestnuts in a microwavable-safe casserole dish.

In a small bowl, whisk together minced garlic, water, teriyaki sauce, and cornstarch.

Pour the sauce over the vegetables.

Cover the dish tightly with plastic wrap.

Microwave on high for 4 minutes.

Stir the vegetables.

Recover the dish with plastic wrap.

Microwave for an additional 3-4 minutes, or until the vegetables are cooked to your desired texture and the sauce has thickened.

Sprinkle with toasted sesame seeds.

Serve immediately.