This is not an ad, but recently I've been buying minced steak from Donald Russell in Scotland whenever it's half price. It arrives frozen in one-pound packs. One of those packs makes four burgers. I add absolutely nothing. The meat is so flavoursome. I just squash the meat into patties, slightly thinner in the middle, and fry in a splash of oil very hot for 2 mins 30 secs each side, then rest for five minutes. With luck I'll judge it to just a hint of pink. They are fabulous with some oven chips and green veg. Ketchup if you're a philistine, but I like a few cherry tomatoes roasted in olive oil with some added fresh basil with mine.