For an even richer flavor, consider using roasted garlic instead of fresh. Simply roast a head of garlic until soft and caramelized, then squeeze out the cloves and mash them into the potatoes. Feel free to experiment with different types of feta cheese. A Greek feta will offer a more pronounced tang, while a French feta tends to be milder and creamier. A splash of heavy cream or sour cream can be added for extra richness and tang. Garnish with a sprinkle of fresh herbs, such as chopped chives or parsley, for a pop of color and freshness.