From a seated position with straight legs, bend the right knee and bring the right foot back and outside of the right buttock. This creates an internal hip rotation.
The shin is on the mat and the sole and heel are facing up.
Lengthen the spine and fold forward, keeping the right hip grounded as much as possible.
Grab the sides of the feet, or bind the right hand to the left wrist behind the foot.
Form tips
It might be necessary to your hand to roll the calf muscle outward and away from the right femur.
Aim to keep the femur bones parallel to each other
Focus on grounding the right hip. To do so, think of folding in between the legs to balance the weight. If grounding is not possible, try the version with the block under the sit bones.
If you feel some discomfort in the knee, try opening the right leg to the side more, increasing the angle between the femur bones.
Risks
Bending the leg in this pose requires deep knee flexion and internal rotation. Stop immediately if you feel any sharp, pinching, or "electric" pain inside the knee joint.