Pork Medallions With Pears without fish meat

1 (12 ounce) pork tenderloin 1/4 teaspoon salt 1/4 teaspoon black pepper 1 tablespoon vegetable oil 1 onion , sliced 2 cups mushrooms , sliced 1/2 sweet red[...]

5 teaspoons butter 1 shallot , finely chopped (2 tablespoons) 1 (4 1/2 ounce) jar Green Giant sliced mushrooms, drained 1 teaspoon vegetable oil 1 pork[...]