Bring a large pot of water to a boil.
Season the chicken with a pinch of salt and pepper, then sear in a non-stick skillet over medium-high heat until golden and cooked through. Set aside.
In a bowl, combine the ricotta, egg white, parmesan, salt, and pepper until smooth.
Gently fold in the flour until a soft, slightly sticky dough forms.
Using two spoons or floured hands, form the dough into small gnocchi-sized balls.
Drop the gnocchi into the boiling water and cook until they float to the surface, about 2 to 3 minutes.
While gnocchi cook, melt the butter in the skillet over medium heat, adding the sage leaves and minced garlic until the butter is slightly browned and fragrant.
Transfer the cooked gnocchi and chicken into the skillet, tossing gently to coat in the sage butter before serving.