Remove zest from lime, half of lemon and half of the orange. Try to remove as little white part (pith) as possible.

In a small saucepan, combine citrus peels, water and stevia (or other sweetener). Simmer on medium low heat for about 5 minutes.

Squeeze the juice from the lime, 1/2 orange and 1/2 lemon. Try to get as much juice and pulp as you can. Reserve the remaining fruit for decorating the serving glasses.

Remove any seeds from the juice and pour into a glass jar. Strain the zest mixture into the jar. Let cool.

To serve: fill a cup with ice, add about 1 to 1 1/2 ounce of citrus squash and fill the glass with seltzer. Garnish with lemon or orange wedge.