Yummy beverages!
Don't put the jalapeños in if you want a regular Margarita!
Combine in glass. If you want you can muddle the jalapeño but I've found you don't really have to. Use as many slices as you want. If they are small I'd put 2-3, if they are big you can probably just use one.
Combine in cocktail shaker with ice and shake. Strain into glass.