Compatible seasonings for roasted pork tenderloin include oregano, rosemary and thyme. Garlic, cumin, brown sugar and cinnamon are also good choices, depending on the desired flavor profile.
Pork tenderloin roasts well with a wide variety of spices and seasonings. For a smoky, sweet, flavor, consider a rub of cumin, chili powder and brown sugar. For a more savory profile, use oregano, rosemary and thyme, dipped in a tablespoon of olive oil. Whatever the desired flavor, salt enhances it, when used in proper and healthy proportions. Aromatics such as garlic and onion also complement a number of flavor profiles. For best results, use fresh herbs whenever possible.