1Place pears in large bowl. If too much liquid, drain through fine strainer. Mix in pecorino, mascarpone and egg yolk.
2Place 1 wonton wrapper on work surface. Place 1 to 1 1/2 teaspoons mixture in middle of wrapper. Brush edges with water, and fold wrapper over. Press firmly to seal.
3Fill 4-quart saucepan two-thirds full of water. Add salt; heat to boiling. Gently slide in 5 ravioli. Cook 3 to 4 minutes or until done. Repeat until all of the ravioli is cooked.
4In 8- to 10-inch skillet, heat butter and sage over medium-high heat until butter is golden brown, reducing heat if needed to keep butter from burning. Remove sage; pour butter over ravioli. Sprinkle with extra cheese as desired.