Heat olive oil in a skillet over medium-high heat. Add mushrooms and saute for 2 to 3 minutes. Add green beans and cook until bright green, about 3 minutes. Drain off excess water, if needed.
Add vinegar, soy sauce, honey, sesame oil, hot sauce, salt, and pepper; saute until mushrooms are soft and beans are well coated, about 3 more minutes. Serve.