½ cup water 

1 4 ounce box strawberry flavored gelatin mix

1 ½ cups watermelon puree

1 cup pink grapefruit juice

Bring one half cup water to a boil.  Place the gelatin in a heatproof container with a spout and pour the water into the gelatin and stir to dissolve.  Combine the dissolved gelatin and the watermelon puree.  Divide the watermelon mixture among 12 shot glasses or small juice glasses.  Cool until thick but not set.  Top each glass with the grapefruit juice and tequila.  Makes about 12 shooters.

 

Source:  www.watermelon.org