Chocolate Ravioli With Cherry-Orange Sauce
["1 3/4 c. all-purpose flour", "1/4 c. unsweetened cocoa powder", "2 Tbsp. sugar", "1/4 tsp. salt", "2 beaten eggs", "1/3 c. water", "1 tsp. cooking oil", "1 medium orange", "2/3 c. low-fat Ricotta cheese", "2 Tbsp. sugar", "1/3 c. sugar", "4 tsp. cornstarch", "1/4 c. water", "3 c. pitted tart red cherries", "1 Tbsp. kirsch or orange liqueur", "light whipped cream"]
["Finely shred 1 teaspoon orange peel.", "Peel and section orange; set aside.", "For filling, combine Ricotta cheese, the 2 tablespoons sugar and orange peel; set aside."]
["flour", "cocoa", "sugar", "salt", "eggs", "water", "cooking oil", "orange", "low-fat Ricotta cheese", "sugar", "sugar", "cornstarch", "water", "red cherries", "light whipped cream"]