Watermelon Rum Slush

Ingredients

• 1 piece (3 1/2 lb.) seedless watermelon
• 3/4 cup pineapple or white grape juice
• 1/2 to 3/4 cup rum or more fruit juice
• 1/3 cup lemon juice
• Sugar

Preparation

1. 1. Cut rind off watermelon and discard. Cut fruit into 1/2-inch chunks.
2. 2. Line a 10- by 15-inch pan with plastic wrap. Arrange fruit on wrap in a single layer. Freeze until firm, 1 to 2 hours; if making ahead, transfer frozen chunks to a freezer bag.
3. 3. In a blender, combine half the pineapple juice, rum, and lemon juice. Whirl, gradually dropping in half the frozen watermelon chunks, until smoothly puréed. Sweeten to taste with sugar and pour into a pitcher or directly into glasses. Repeat to make a second batch.