How to Make It
Let ice cream stand at room temperature until slightly softened, about 5 minutes. Scoop into a large bowl; break into pieces using a wooden spoon or rubber spatula.
Add jam, lemon juice, and lemon zest, and gently fold until evenly incorporated.
Spoon ice cream into a 9- x 5-inch loaf pan; cover with plastic wrap, pressing directly onto surface of ice cream. Freeze until firm, at least 2 hours, before serving.