Instead of being served on traditional buns, these turkey sliders are sandwiched inside mini avocados for a clever (and low-carb) meal--because why put avocado on your burger when you can put your burger on an avocado? Quick pickled onions are a pretty and tasty topping, and chipotle mayo seals the deal. Bonus: the burgers are cooked on a baking sheet, so it's easy to whip up a whole batch.