In 2 quart saucepan, melt butter over medium heat. Continue to cook, stirring, until butter turns golden brown. (If butter gets too dark, it will be bitter). Remove from heat and stir in sage, 1⁄4 teaspoon salt, and pepper; set aside.
In medium bowl, combine Ricotta, Parmesan, parsley, and remaining 1⁄2 teaspoon salt. Sprinkle flour over Ricotta mixture and, with your hands, work mixture into soft, smooth dough. If dough is sticky, add some flour. Work dough just until flour is incorporated into cheese mixture; do not overwork.
Break off piece of dough; on lightly floured surface, roll into 3⁄4 inch-thick rope. (If rope doesn't hold together, return to bowl with remaining dough and work in more flour.) Cut dough rope into 3⁄4 inch lengths. Place one piece of dough on inside curve of fork tines, gently pressing on dough with thumb as you roll dough along tines. Allow dough to drop off fork, slightly curling in on itself, forming an oval. One side of gnocchi will have ridges and opposite side will have an indentation. Repeat rolling, cutting, and shaping with remaining dough. (Gnocchi can be made up to 4 hours ahead to this point. Arrange in single layer in floured jelly-roll pan; cover and refrigerate.)
In 5 quart sauce pot, heat 4 quarts water to boiling over high heat. Add half of gnocchi and cook until gnocchi float to surface, 2 to 3 minutes. With slotted spoon, transfer gnocchi to warm shallow serving bowl. Repeat with remaining gnocchi. To serve, toss gnocchi with sage butter.