Heat a large skillet over medium; add 1 tablespoon of the oil and 1/2 stick of the butter.
Mix the mustard powder, garlic powder, onion powder and 1 1/2 teaspoons each salt and pepper in a bowl. Coat the sliced tenderloin on all sides with the spice mixture. Place in the hot skillet and cook until golden brown, about 3 minutes per side. Remove to a plate and let rest.
Meanwhile, slice the tomatoes in half and cut the asparagus into 1-inch pieces. Mince the garlic, sprinkle with salt and mash to a paste with flat of a knife.
Heat a second skillet over medium; add the remaining 1 tablespoon oil and another 1/2 stick of the butter. When the oil and butter are hot, add the asparagus and some salt and pepper; cook for 3 to 4 minutes, stirring. Stir in the garlic. When the asparagus is nice and bright green, add the tomatoes and the remaining 1/2 stick butter. Cook until the tomatoes are starting to soften. Pour in the cream and pork drippings and continue to cook for about 2 minutes more. Stir in the sage.
Arrange the pork on plates, spoon over the tomato-asparagus cream sauce and serve. Enjoy!
This recipe was created by a contestant during a cooking competition. It has not been tested for home use.