Remove beans from the pod. Bring a pot of salted water to a boil. Drop fava beans in a pot with boiling water and boil for 1 minute.Transfer immediately to a bowl with ice water.
Remove the skin from each bean. Help yourself with the tip of a small knife, squeeze, and the bean will pop out.
In a food processor blend mint leaves, pecorino cheese, and garlic clove cut into small pieces.Add fava beans and oil. Blend until combined.
For the best flavor, use fresh fava beans that are bright green color, avoid over mature yellow beans.
If you like a more rustic texture, set a handful of fava beans aside, blend everything, then add the reserved fava beans and blend again. This way you'll have two different textures of fava beans in your pesto.