Filet mignon is actually part of tenderloin roast. It's the front portion that's nearest the ribs, and it's one of the most expensive cuts of meat available. One whole tenderloin roast only yields a few servings of filet mignon. You can place your tenderloin roast order with your smartphone through Instacart and receive it in as little as 2 hours! When you use Instacart, you'll be able to spend more of your time having fun, relaxing with friends and family members, and cooking delicious meals.