01 - Place watermelon cubes and strawberries in a blender, ensuring all fruit pieces are evenly distributed for consistent blending.
02 - Pour in lime juice and sweetener if desired. The acid balances sweetness and enhances natural fruit flavors.
03 - Process mixture until completely smooth, approximately 1-2 minutes. Stop to taste and adjust sweetness level if needed before continuing.
04 - Distribute blended mixture evenly among popsicle molds, leaving about ¼ inch space at the top for expansion during freezing.
05 - Place popsicle sticks into center of each mold. If sticks won't stay upright, freeze partially for 30 minutes before inserting.
06 - Freeze for minimum 4 hours or overnight until completely firm. Popsicles should be solid throughout before removing.
07 - Run mold briefly under warm water for 10-15 seconds to loosen. Gently pull sticks to release popsicles. Serve immediately.