Peel butternut and carrot and cut then in small pieces.
If you have a large chuck you can cut that into smaller pieces to
Put the carrots and butternut squash in a oven proof pot and add 1-2 cup of beef stock. Lay the chuck on top and cover with a lid of alu foil.
Let it stay in the oven 3-4 hours at 325F.
When it is finish the meat is very soft.