Tear greens from bok choy and coarsely chop. Set aside.
Cut bok choy stalks into 1-inch pieces.
Coat frying pan with cooking spray or vegetable oil and heat over medium-high heat.
Add boy choy stalks, onions, and green beans to pan. Sauté until the onions are translucent, about 5–7 minutes.
Add bok choy greens and sauté until wilted, about 1 minute.
Drizzle in soy sauce, stirring slowly to coat vegetables. Remove from heat. Season with pepper, if using, and serve.
Notes
Change it Up
Add 1 teaspoon of fresh, peeled and sliced ginger, or 1/2 teaspoon ground ginger, 1 teaspoon minced garlic, and shredded chicken or garbanzo beans to make it a meal.
Try using a blend of mushrooms, summer squash, and zucchini in place of bok choy. Garnish with sliced almonds.