Use real lemon juice for this refreshing Sparkling Sugar-Free Lemon Ice. This sugar-free lemon ice is a tasty treat for the warmer months, but you'll want to enjoy it all year long.
1 cup boiling water
1 pkg. (4-serving size) JELL-O Lemon Flavor Sugar Free Gelatin
1 cup cold lemon lime-flavored seltzer
1/2 tsp. grated lemon zest
3 Tbsp. fresh lemon juice