Pour the guava juice into an ice cube tray and freeze overnight. (One cup of juice should make 8 standard ice cubes.)

Rub a lime wedge around the edge of a margarita glass and dip immediately in the margarita salt, turning to coat. Place the glass in the freezer for 10 minutes.

In a blender, combine the lime juice, tequila, Triple Sec, simple syrup, and guava ice cubes and pulse until smooth. Pour into the prepared glass, garnish with a lime wedge, and serve immediately.

1/4 cup sugar

1/4 cup water

Combine sugar and water in a small saucepan and bring to a boil over medium-high heat. Boil mixture for 2 minutes, stirring to dissolve the sugar. Remove from the heat and cool completely.

Yield: enough for 4 margaritas