Pork, Cuban Style

1 2/3 to 2 pounds pork tenderloin, 2 pieces, the average weight of 1 package, trimmed
Extra virgin olive oil or vegetable oil, for drizzling
1 small onion, minced
4 cloves garlic, finely chopped
2 limes, zested
1 large orange, zested
1 teaspoon coarse salt
1 teaspoon coarse black pepper
1 teaspoon dried oregano

Preheat oven to 425 degrees F

Coat tenderloins with oil. Combine onion, garlic, citrus zest, salt, pepper and dried oregano in a pile on your cutting board. Pack this coating equally and evenly onto the tenderloins. Heat a large skillet. Add a drizzle of oil and sear tenderloin on all sides. Then place in hot oven to roast 20 to 25 minutes.