Anejo Tequila approximately two and a half shots
1 and a half limes fresh squeezed you can cheat and use commercial margarita mix plus half a lime
1/2 shot triple sec
Pour all ingredients over ice in a shaker then shake for about 30 sec or till frost forms on shaker
Take reaming lime half and use it to rim the glass. Dip glass rim in salt then pour in margarita with ice.
Squeese in last half of lime and add a float of Grand Marnier stir slightly.