Optional: To salt the rim of your glass, rub the edge with a wedge of lime, then dip it in a plate of sea salt. (I'm a little extra so I like to coat my rim in a 50-50 mixture of salt stirred with Tajin.)
Add the jalapeno slices to a cocktail shaker and use a pestle or wooden spoon to muddle it.
Then, add ice to the shaker, as well as the freshly squeezed lime and orange juice and the agave. Shake for 30 seconds, then strain into your prepared glass. If desired, add some crushed ice to your glass, then serve. (Optional: garnish your cocktail with extra slices of jalapeno or a lime wedge.)
Notes
Alternatively, if you don't have a cocktail shaker you can shake this spicy skinny margarita recipe in a Yeti-style tumbler or simply stir the ingredients together in a glass.Instead of pressing the juice and slicing the jalapeno, I add a peeled orange, 2 peeled limes and ½ of an entire jalapeno (with seeds) to my juicer and let it do the work for me. Then I add 2 oz of this mixture to a shaker with the tequila and agave This comes in handy when multiplying the recipe to make a big batch!