If you have soft limes, you can cut them in half and then flip them inside out. This will make removing the pulp easy. If the lime is too hard for that then you will need to take a paring knife around the edges of the halves to loosen the pulp from the rind.
In food processor or blender, puree the watermelon until smooth.
Strain through a fine mesh sieve placed over the bowl. To get all the juice, use the back of a spoon to press on the pulp to extract. The pureed watermelon should yield about 1 cup of watermelon juice. Set aside.
Pour water and limeade concentrate into a small saucepan and sprinkle with gelatin. Allow to soak for a minute or two.
Heat over low heat until gelatin is fully dissolved, about 5 minutes.
Stir in 1 cup of watermelon juice, the Grand Marnier and tequila.
Chill in the fridge for at least 2 hours.
Using a sharp knife, carefully cut each lime half in half again, making wedges.
|