Shredded beef from frozen recipe in a Dutch Oven is amazing! Mississippi frozen chuck roast with pepperoncini peppers and TONS of flavor, cooked to tender.
Preheat oven to 350 degrees F. Lay frozen chuck roast inside dutch oven and pour jar of pepperoncini sliced peppers with the juice over the top with 16 oz from the jar of salsa. (rest will be used at the end)
Put the lid on and into your oven on the middle rack for about 3.5 hours. Flip over after hour 2 and baste some of the liquid below over the top of the meat. Continue cooking the rest of the 1.5 hours or until meat shreds nicely with 2 forks. Timing will depend on how thick yours is.
Remove meat and place on cutting board. Remove and discard bone and chunks of fat. Chop meat up and put back into the pot. Pour remaining salsa (or as much as you need) on top and stir to coat so it is nice and moist.