We make these for every fall/winter party we have! I love these. Another way to do it is a large non stick skillet, drop the olives in with the rosemary and pepper and stir them until they are warmed through and the rosemary has infused its flavor into them. We like to sprinkle a little feta over the top. I love the ease of doing it in the foil, I am going to try it for my next gathering!