Fill a cocktail shaker with ice. Add tequila, lime juice, and simple syrup and orange liqueur. Cover and shake until mixed and chilled, about 30 seconds. Spread lime-salt-sugar on a plate. Moisten the rim of a chilled rocks or wine glass with a lime wedge and press into mixture to rim edge. Strain margarita into glass.
Yield:About 1 1/2 cups
Place sugar and water in a small saucepan. Cook over low heat, stirring, until sugar dissolves. Remove from heat and let cool. Store in a sealed container in refrigerator for up to 1 month.
Blend zest, salt and sugar together in a small blender or mini food chopper. Use immediately.
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