In a small bowl, mix together the Dijon mustard, mashed avocado, olive oil, salt, pepper, garlic, and onion powder. Rub the mixture all over the beef tenderloin roast.
Place the beef tenderloin roast in a shallow baking dish.
Bake in preheated oven for about 40 minutes, or until the internal temperature of the roast reaches 145°F.
Let the roast rest for 10 minutes before slicing and serving.
Interesting Facts
Beef tenderloin is a lean cut of beef that is very tender when cooked correctly.
Avocado is high in fiber, potassium, and healthy fats.
Dijon mustard is a French-style mustard that is made with white wine and spices.