1 small onion , diced
10 cloves garlic , crushed or minced
1/2 cup chopped fresh thyme
1/4 cup fresh rosemary
1/2 cup extra-virgin olive oil
2 Tbsp. red pepper flakes
Freshly ground pepper to taste
1/2 cup apple cider vinegar
1 pork tenderloin (about 2 pounds), butterflied

Preheat the oven to 350°.

Prepare the run by combining the onion, garlic, thyme, rosemary, oil, red pepper flakes, black pepper and vinegar in a bowl. Stir to mix well.

On a half sheet pan with a rack, place the pork, and coat with the rub.

Place the pork in the oven on the lowest rack.

After 25 minutes, turn the pork over and cook for an additional 20 minutes, or until fully cooked throughout.

Let the pork rest for 10 minutes before slicing and serving.