2 tablespoons (1 shot) tequila (optional) (I added 4 shots to make four drinks. It will be too weak otherwise)
Coarse salt (optional)
Fresh lime slices
How to make it
Place sherbet, evaporated milk, ice and tequila in blender; cover. Blend until smooth. If salted rims of margarita glasses are desired, dip rims into water, then salt and shake off excess. Pour margarita mixture into glasses. Garnish with lime slices.