in a heated skillet add 1/2 of the butter and olive oil. saute onions until golden brown. remove and set a side.
in the same heated skillet, add remaining butter and olive oil. add mushrooms, granulated garlic and thyme to skillet. saute mushrooms until golden brown. remove and set aside. add prime rib slices and worcestershire sauce to skillet. heat through and remove
set your oven on broil (high). brush the tops of your bread with olive oil & italian seasoning mixture. on the bottom half of bread put 1/4 of the italian blend cheese, 1/4 of the mushrooms, some prime rib, 1 slice of pepper jack cheese, more prime rib follwed by another slice of pepper jack cheese. place on an oven proof pan. broil until cheese has melted