Shaken, double strained into coupe, no garnish.
I used 2 big jalapeño slices, with seeds, per 2oz of Don Julio Anejo Tequila infused for 1 or 2 days. Gives a nice pepper flavour but no heat . Once I left the infusion or over a week and it was too hot for me to handle, so just taste your infusion and decide based on your taste. Might try with agave nectar instead of simple syrup.