Preheat oven to 400 degrees.
Mix together the ground beef and spices in a large bowl.
Cover roasting pan or sheet pan with foil.
Form into 7-8 burgers and place them on a roasting pan or on a cooling rack set on a sheet pan.
Cut raw bacon slices in half and arrange in large cast iron skillet or on another sheet pan. Arrange onion and jalapeno slices on top.
Place both pans in the oven and cook for 20 minutes; then check the internal temperature of the burgers (minimum of 145 degrees for medium rare) and the texture of the bacon.
If you want to continue cooking the bacon, use a spatula to stir the bacon and vegetable around first.
Continue cooking either or both sheet pans depending on how crunchy you like your bacon and/or how cooked you like your burgers.