Season the ground chuck

Mix it well form small patties make them thin and wide, because they will shrink as they cook.

Turn as needed

Move to a paper towel to absorb excessive amounts of oil

Repeat as needed till all patties are done

Slice the onion

Add to the beef drippings

Fry till soft

Move to a paper towel to absorb excessive amounts of oil and season with the seasoned salt

Get the yeast rolls out of the oven. Add a bit of butter and kosher salt on top.

Split the yeast rolls and add the patties

Add onions

Add the mustard and ketchup