Place simple syrup on a small plate and margarita salt on another small plate.

Dip the rim of the glasses into the simple syrup and then into the margarita salt.

Fill your glass with ice.

Add about ¼ cup of ice to the cocktail shaker and pour in the tequila, Grand Marnier, Cordon Rouge, orange juice, lime juice, and agave.

Give the salt shaker a good few shakes.

Pour the mixture into the glass.

Garnish with lime slices, lemon slices, and Maraschino cherries.