Season the diced chicken breast with half of the salt and pepper.
Sauté the chicken in a non-stick pan over medium-high heat until golden brown and cooked through, then set aside.
In a medium bowl, combine the ricotta cheese and egg, whisking until smooth.
Gradually fold in the flour and remaining salt and pepper until a soft, slightly tacky dough forms.
Bring a pot of salted water to a gentle boil.
Use two small spoons to drop bite-sized dollops of the ricotta mixture into the boiling water.
Boil the gnocchi for 2-3 minutes or until they float to the surface, then drain carefully.
In the same pan used for the chicken, melt the ghee over medium heat until it begins to bubble.
Add the minced garlic and whole sage leaves, frying for 1 minute until the sage is crisp and aromatic.
Toss the cooked gnocchi and chicken into the pan, coating them thoroughly in the sage butter.
Finish with a sprinkle of grated parmesan and fresh lemon zest before serving.