Add a piece of pineapple, 2 teaspoons simple syrup, and 1 teaspoon chopped mint to each of 4 tall glasses and muddle. Fill half of each glass with ice.
In a pitcher, mix together the lemon juice, seltzer and limoncello, if using. Divide the mixture among the glasses and garnish with fresh pineapple and mint sprigs.
Heat the water and honey in a small pot over low heat. When the mixture is hot remove it from the heat and let cool.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.