Needless to say, when we went to Anaheim in February for vacation - we had to eat at In N Out 2 times in 7 days!!
If you know anything about In N Out, you know there is their basic menu and their secret menu. I guess its not really that secret - it's on their website - just not on the menu at the restaurant. You can get grilled onions, animal style, mustard grilled, grilled buns.... and a few others - you just have to ask!!
Nate likes a double double mustard grilled with grilled onions and all the toppings - that means 2 quarter lb patties grilled in mustard, cheese on each patty, grilled onions, lettuce, tomato, pickle and raw onions, mayo mustard and ketchup.
Tonight I made my own version - Mustard grilled Onion Burgers - and I made Nate's about a 1/3 of a lb, a little bigger than a single patty, but big enough that he didn't need to make it a double.