When I was last visiting my Grandsons in Florida one was requesting meatloaf while the other wanted burgers. I decided to combine the two requests and came up with this. We loved them and they were fantastic, another keeper and eaten often.
In a bowl, combine all the ingredients together very well by hand. Divide into 4 portions and form into patties (the sirloin does not shrink, so you get really nice thick burgers). Place on a plate and cover with plastic wrap. Place in the fridge for at least an hour before grilling. Fire up the grill to 400 degrees and grill the burgers for 6-7 minutes per side.