From Adho Mukha Svanasana, ground your left foot at a 45 degree angle. Inhale, step your right foot between your hands, check for front heel to back arch alignment, exhale here.
Inhale, press into your feet to come up, legs straight, open your hips to the side of the mat, reach your arms out to shoulder height, palm facing down. Exhale, reach your right arm forward, hinge to your right from the hip joint. Place your hand on your shin, or a brick, or the ground inside/outside your right foot.
Bottom waist rolls forward, top waist rolls back, reach your left arm up, palm facing left, gaze to your left fingertips.