Makes about 3 1/2 dozen appetizers.

1/4 c. shredded Cheddar cheese
1 (3 oz.) pkg. cream cheese, softened
1/4 c. butter, softened
4 slices boiled ham
Ritz crackers

In small bowl, combine Cheddar cheese, cream cheese and butter until well blended. Spread mixture on ham slices. Roll up from short sides: Chill for several hours. To serve, slice rolls into 1/2 inch thick slices. Arrange slices on top of Ritz crackers.