For the strawberry syrup:
1 heaping cup chopped strawberries
2 tbsp. sugar
1 tsp. lemon juice
2 tbsp. cold water
Pinch of salt
For the lemonade:
1 cup very hot water
2/3 cup sugar
1¼ cups freshly squeezed lemon juice
4½ cups cold sparkling water or seltzer
To make the strawberry syrup, combine the strawberries, sugar, lemon juice, water and salt in the bowl of a food processor or blender. Puree until smooth. Pour the mixture through a fine mesh strainer to remove the seeds, pressing down to extract as much liquid as possible.
To make the lemonade, combine the hot water and sugar in a pitcher. Stir until the sugar is dissolved. Mix in the lemon juice and water. Stir in the strawberry puree.
To serve, rub a wedge of lemon or one of the spent lemon halves around the rim of a glass and then dip in sugar. Fill with ice if desired and then lemonade. Garnish with sliced lemon or strawberries. Serve immediately.