Combine the fruit powder seasoning, salt and sugar in a shallow dish. Pour 1/4 cup water into a second shallow dish. Dip the rim of your glasses into the water first, and then into the fruit powder mixture to rim the glass. Place large ice cubes into a cocktail
shaker, and then add the tequila
, lime juice, raw sugar and orange liqueur
. Shake well. Spoon the tamarind puree into the bottom of each glass, fill with ice cubes and pour the margarita
mixture over. Serve with lime wedges.