Beef tenderloin is a cut of meat from the tender loin of a cow. Cooking a beef tenderloin in a convection oven is similar to cooking in a conventional oven, except that the tenderloin will cook faster since a convection oven's fan circulates the heat evenly. Purchase the highest quality tenderloin and make an adjustment for the cooking time.
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Preheat the convection oven to 350 degrees F.
Trim off any excess fat from the tenderloin. Brush the tenderloin lightly with vegetable oil.
Season the beef tenderloin with your choice of seasonings. Salt, pepper, soy sauce and thyme are examples of seasonings that pair well with this cut of beef.
Place the beef tenderloin on a shallow pan and place in the convection oven.
Bake the beef tenderloin 25 to 30 percent less time than your recipe suggests, since convection ovens cook foods faster. If you are not working from a recipe, cook the tenderloin for 20 to 30 minutes, checking periodically. The USDA recommends a minimum internal temperature of 145 degrees F, as measured with a meat thermometer.