In a medium bowl, combine the ricotta cheese, egg white, parmesan, cassava flour, sea salt, black pepper, and nutmeg until a soft dough forms.
Bring a large pot of salted water to a gentle simmer.
Dust a clean surface with a pinch of cassava flour and roll the dough into long ropes about 1/2-inch thick, then cut into 1-inch pieces.
Drop the gnocchi into the simmering water; they are finished when they float to the surface, about 2 to 3 minutes.
While the gnocchi cook, heat a large non-stick skillet over medium-high heat and add the shrimp, searing for 2 minutes per side until pink and opaque.
Remove the shrimp from the skillet and set aside. In the same skillet, melt the grass-fed butter until it begins to foam and turn slightly golden.
Add the fresh sage leaves to the butter and fry for 30 seconds until crisp, then stir in the baby spinach until just wilted.
Transfer the cooked gnocchi directly from the water to the skillet using a slotted spoon.
Add the shrimp back into the pan and toss everything gently to coat in the sage butter sauce before serving.