A hearty serving of tender roast beef with a healthy side of slow-cooked vegetables served over a creamy bed of mashed potatoes is my idea of the perfect comfort food meal. Roast beef is what Sunday dinner dreams are made of, and it has always been a meal that makes me think of my family table growing up. Most people don’t think of roast beef when they think of healthy eating, but it really can be! This recipe is 399 calories per serving (and is complimented excellently by my lighter mashed red potatoes) and is only 9 net carbs per serving. I have included the instructions to make this roast beef in either the instant pot (quick and easy!), slow cooker (set it and forget it!) or in the oven (easy and old school!). I hope you get a chance to enjoy this delicious recipe around the table with your family!