Thai-Style Long Beans with Pork

In a large skillet, heat oil over high heat until very hot. Add curry paste and immediately begin stirring. Add long beans and toss with paste, stirring constantly until beans are just tender, about 3 minutes. Remove beans from skillet. Reduce heat to medium-high and add pork tenderloin slices. Cook pork slices until brown on each side, about 1 minute per side. Return beans to skillet; add fish sauce and brown sugar as desired. Toss together and serve immediately over brown rice.