Step 1

In a large skillet heat the oil until shimmering. Season the chuck roast to taste with the salt and pepper. Sear the meat in the hot oil, turning it to brown all sides. Transfer the roast to the crock of a slow cooker.

Step 2

Add the onion, mushrooms, and shallot to the drippings. Cook, stirring until the onions are clear and the mushrooms are lightly browned. Add the ale and the tomato paste to the pan. Season with salt and pepper. Transfer this mixture to the slow cooker.

Step 3

Cover and cook on low for 8 to 10 hours or on high for 4 to 6 hours. The meat should be fall-apart tender.

Step 4

Serve the roast with the drippings.