You will need a flat roasting pan like a cookie sheet/stone works best. You will need to heat up the pan/stone with the oven and empty. This cooks this cooks in 20-30 minutes and is tender.
1.5 TBSP Olive oil
Pork tenderloin and most packages come with 2. Cook them both.
Make a rub from garlic powder, oregano, salt and pepper. Coat pork with the rub and olive oil. Let sit while your sheet pan and oven get to 400. Once oven is ready put two lines of olive oil on sheet pan and place the pork tenderloins on each. Bake for 10 minutes then turn them. Bake for 20 minutes. Check meat temp of 155 you are good to go. Let stand for 10 minutes then slice and serve with gravy and rice.