Combine sugar and water in saucepan and heat just until sugar has dissolved. Remove pan from heat

Add lime juice, lemon and orange juices and stir; cool to room temperature.

Put raspberries into blender or food processor and blend until smooth. Taste and add sugar if necessary if using fresh berries.

Add juice mixture, tequila and orange liqueur and process just to blend. Strain through mesh strainer to remove any raspberry solids.

Pour into a container and freeze overnight.

Rim a glass with a salt and sugar combination and scoop the slush into the glass. Add a straw and have fun!