Heat oven to 325 °F.
With an electric mixer, beat cream cheese until smooth.
Stream in sugar.
Beat until light and fluffy.
Beat eggs in one at a time.
Add lemon juice, zest, and vanilla.
Beat well.
Pour into prepared crust.
Dollop jam 1 Tablespoon at a time on top of filling.
Use a cake tester or dull knife to swirl.
Bake for 30-35 minutes, or until just set in the middle.
Allow to cool completely.
Cover and refrigerate overnight, or until completely chilled.