Yes, I have frozen ricotta cheese for later use.
Besides lasagna, I also use ricotta cheese in these cookies:
RICOTTA CHEESE COOKIES
Preparation: 30 minutes plus cooking
Bake: 15 minutes per batch
2 cups sugar
1 cup margarine or butter, (2 sticks), softened
1 container (15 ounces) ricotta cheese
2 teaspoons vanilla extract
2 large eggs
4 cups all-purpose flour
2 tablespoons baking powder
1 teaspoon salt
1½ cups confectioners sugar
3 tablespoons milk
red & green sugar crystals
Preheat oven to 350 F. In large bowl, with mixer at low speed, beat sugar & margarine or butter until blended. Increase speed to high; beat until light & fluffy, about 5 minutes. At medium speed, beat in ricotta, vanilla & eggs until well combined. Reduce speed to low. Add flour, baking powder & salt; beat until dough forms. Drop dough by level tablespoons, about 2 inches apart, onto ungreased large cookie sheet. Bake about 15 minutes or until cookies are very lightly golden (cookies will be soft). With pancake turner, remove cookies to wire rack to cool. Repeat with remaining dough.
When cookies are cool, prepare icing. In small bowl, stir confectioners sugar & milk until smooth. With small metal spatula or knife, spread icing on cookies; sprinkle with red or green sugar crystals. Set cookies aside to allow icing to dry completely, about 1 hour. Makes about 6 dozen cookies.