Heat olive oil in a large skillet over medium-high heat.

Brown the chuck roast on all sides.

Transfer the browned chuck roast to a slow cooker.

Add apple cider to the slow cooker.

Sprinkle beef bouillon granules into the apple cider and stir to mix.

Arrange onion wedges, carrots, and apple quarters on and around the meat.

Sprinkle salt over the ingredients.

Cook on high for 1 hour.

Reduce heat to low and cook for 6-8 hours, or until the meat is easily pulled apart with a fork.