In a medium bowl, combine the ricotta cheese, egg whites, grated parmesan, sea salt, black pepper, and nutmeg until the mixture is completely smooth.
Gently fold in the cassava flour one tablespoon at a time until a soft, slightly tacky dough forms, being careful not to overwork the mixture.
Bring a large pot of filtered water to a gentle simmer and season with a pinch of salt.
Using two small spoons, scoop and drop rounded mounds of the dough into the simmering water; cook until they float to the surface, which takes about 2 to 3 minutes.
While the gnocchi cook, melt the ghee in a large non-stick skillet over medium heat and add the fresh sage leaves, cooking until they are crisp and the ghee is aromatic.
Use a slotted spoon to carefully transfer the cooked gnocchi from the water directly into the skillet with the sage and ghee.
Sear the gnocchi for 1 to 2 minutes per side until a light golden crust develops on the exterior.
Slice the pre-cooked grilled chicken breast into thin strips and add it to the skillet for 60 seconds to warm through.
Transfer the gnocchi and chicken to a plate, drizzling any remaining sage-infused ghee from the pan over the top before serving.