In fact, Greek yogurt is one of several ways to upgrade canned tuna. Another method is olive oil. This adds a lot of moisture ...

The olives can be stuffed and breaded ahead of time. You can even fry them in advance and keep them warm in a low-temperature oven. The only labor-intensive part is stuffing the olives ...

I make a few different variations of my pepperoncini tuna casserole, too. In my Greek spin on the classic, I mix in pepperoncini, chopped Kalamata olives, red onions, tomatoes, parsley ...