- 2 cups husked and pitted ground cherries
- 2 cups white sugar
- 1 lemon, zested, or to taste
- 1 1/2 teaspoons lemon juice
- 1 (3 ounce) package lemon-flavored gelatin mix (such as Jell-O®)
- Place ground cherries in a food processor; pulse until coarsely chopped. Transfer to a large saucepan.
- Stir sugar, lemon zest, and lemon juice into the cherries. Bring to a boil; cook, stirring occasionally, until ground cherries soften, about 15 minutes. Add lemon gelatin; stir until dissolved. Skim any foam off the top of the jam with a slotted spoon.
- Pour jam into two 8-ounce freezer-safe containers. Let stand until thickened and set, about 30 minutes. Transfer to the freezer.