Real Hamburgers

Directions

1. 1
   Carefully mix the meats, steak sauce, egg yolks, salt, and pepper with the tines of a fork, but do not mash it.
2. 2
   Lightly form each hamburger and lightly press into a patty shape.
3. 3
   Make an indentation and put a thin slice of butter inside each hamburger, making sure the butter is entirely encased in the meat.
4. 4
   Heat a grill, broiler, or saute pan and cook the hamburgers for 3 to 5 minutes on each side until almost done.
5. 5
   Remove to a plate and cover with aluminum foil.
6. 6
   Allow the hamburgers to rest for 5 minutes and serve immediately on buns.