1 Cut beef pot roast into 12 equal pieces. Place in 4-1/2 to 5-1/2-quart slow cooker. Add onions, tomatoes, potatoes, broth, garlic, thyme, salt and pepper. 2 Cover and cook on HIGH 5 to 6 hours, or on LOW 8 to 9 hours, or until beef is fork-tender. (No stirring is necessary during cooking.)3 Stir in broccoli slaw; continue cooking, covered, 30 minutes or until broccoli slaw is crisp-tender. Turn off slow cooker. Stir in peas; let stand, covered, 5 minutes.