Scoop jam (or jelly) into the bottom of an 8 ounce drinking glass.
1 - 2 tablespoons jam
Squeeze lemon juice over the jam (or jelly) and stir to combine.
2 tablespoons lemon juice
Top with seltzer water and ice.
8 ounces seltzer water
Notes
For those over 21: Instead of sparkling water use a similarly flavored hard seltzer for a drink with a punch or add a jigger of vodka or rum to the lemon and jam mixture before pouring in the flavored seltzer water.
If you have an eight ounce jar of jam or jelly that is nearly empty, mix your drink right in the jar!