Slow cooker beef roast with potatoes and carrots is an easy, no-fuss meal that the entire family will enjoy. Tender dijon-herb beef roast is slow cooked with onions, potatoes, and carrots.
In a 6 quart slow cooker, add onion, carrots, potatoes, garlic, and beef broth.
In a bowl, combine dijon mustard, salt, pepper, thyme, and rosemary. Brush mustard paste on all sides of beef roast and place in slow cooker on top of vegetables.
Cover and cook on low for about 8-10 hours (or high for 5-6 hours), or until beef roast is tender. Time depend on the size and shape of the roast you're using.
Optionally, whisk together cornstarch and 1-2 tablespoons of water. Remove roast from slow cooker and add the cornstarch mixture to the beef broth, stirring to thicken into a gravy.
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Notes
Leftovers will keep in the refrigerator for 3-4 days.
If you'd prefer to add small diced potatoes and carrots, add them during the last 2-3 hours of cooking (to prevent mushy vegetables).
The size and shape of your roast and make and model of slow cooker (older models cook slower) can affect the cooking time of your roast. Using a larger roast, a bone-in roast, or an old slow cooker will increase cooking time.