Start by sautéing the onions and mushrooms, I generally give them about 45 minutes to an hour to fully cook down. Simply wash, peel, chop and add the olive oil, salt, pepper, Worcestershire and A1 together, cover for a bit and stir occasionally. About half way through uncover and stir more frequently until they have the texture you prefer.

While those are cooking…

Combine the ground meat, ricotta, A1, salt and pepper. Form burger patties in the same shape as your rolls and just a little bit bigger then the rolls (this helps to balance out the meat cooking down). Cover and chill for about 30 minutes.

Heat the grill the medium and cook the patties for about 2-4 minutes preside. The final cook time will completely depend on how you prefer the meat to be cooked-but also on the overall size and thickness of each patty so keep a close eye on the grill.