Homemade Burgers with Yorkshire Brown Sauce

It was about a month ago when we made these burgers. Sliced cheese that I had ordered didn't arrive on time, so I added extra lettuce. Probably such a replacement wouldn't make a sense for J, but he enjoyed his extra lettuce, I believe. This time we used our new Yorkshire Brown Sauce instead of A1. I liked the brown sauce on burger as an alternative to A1. I am getting used to brown sauce. What can it be used for next?