Pork Tenderloin and Mushrooms

1 tablespoon olive oil 2 tablespoons butter 2 pork tenderloin, sliced 1 " thick 1/2 teaspoon salt 1/4 teaspoon pepper , freshly ground 1 shallot , finely[...]

2 pork tenderloin (about 1 lb each) 3 tablespoons butter 1 teaspoon salt 1/4 teaspoon pepper 1 small onion , thinly sliced 1 1/2 cups fresh sliced mushrooms[...]

2 (1 lb) pork tenderloin (about 1 lb each) 3 tablespoons butter 1 teaspoon salt 1/4 teaspoon pepper 1 medium sweet onion , thinly sliced 2 tablespoons flour[...]