*I’ve also made these burgers with feta. When pressed, my family prefers blue cheese (even those who typically don’t care for blue cheese!) slightly over feta. Feel free to experiment. Also, if you’re not sure how some diners will feel about the flavor of the cheese, you could go lighter the first time – I’d suggest ½ cup – until you’re sure. Ultimately, the cheese adds a great deal of moisture in addition to the added flavor.
**For an easy condiment that everyone seems to enjoy, I often serve the burgers with sriracha mayo: simply start with a ¼ to ⅓ cup of mayonnaise and then stir in 1-2 teaspoons of the sriracha (or to taste). I’ve made this with Frank’s RedHot sauce, too, but sriracha is my personal favorite.