To make these pops without the liqueur, simply add an extra 2 tablespoons sugar.
1 pound strawberries, hulled
1-1/2 pounds seedless watermelon, rind removed, cut into large chunks
Juice of 1 large lime
1/2 cup water
1/3 cup sugar
1/2 cup melon-flavored liqueur, such as Midori (optional)
Combine strawberries, watermelon chunks, lime juice, water, and sugar in blender. Blend 20 seconds, pressing down with wooden spoon as needed. Pour mixture through fine-mesh strainer, pressing with spatula, to remove seeds. Rinse blender, then pour strained liquid back into blender with liqueur. Blend another 20 seconds. Pour into molds and freeze 4 hours or overnight.