From Relaxed Down Dog, step your right foot forward, coming into a lunge position. Lower your left knee to the floor, and rest your hands on the ground under your shoulders.
Slowly lower your right knee to the right so you're resting on the outside of your right flexed foot. Keep your arms straight, pressing your chest forward to increase the stretch.
Hold like this for five breaths, then move on to Open Revolved Extended Side Angle.