I had a big bag of lemons, a box of strawberries, and extra powdered gelatin lying around, so I decided to experiment and make:

Strawberry Lemonade Gelatin Dessert

2 envelopes (½ oz) gelatin
1½ cups freshly squeezed lemon juice
~1 pound strawberries
½ cup sugar
2 cups water

Wash and hull strawberries, then purée in a food processor or blender. Using a spatula, press purée through a fine mesh sieve—you should have about ½ cup—and combine with lemon juice in a medium bowl. Sprinkle gelatin over the mixture and let stand for a couple minutes, until expanded. Meanwhile, bring water to a boil and add sugar. Stir to dissolve. Add hot water to bowl and stir constantly for about 5 minutes, until gelatin has completely dissolved. Ladle into four or five 8 oz. ramekins. Refrigerate until set, at least two hours, preferably overnight.

Yields four or five servings.