Place chopped parsley, chopped oregano, minced garlic, crushed red pepper, a pinch of kosher salt, and red wine vinegar in a bowl and stir together.
Add olive oil and let stand 15-20 minutes before serving.
Grilled Pork Tenderloin
Place the pork tenderloins on a baking sheet or in a casserole dish. Salt them and let come to room temperature. (At least 30 minutes and up to two hours.) Meanwhile, heat a grill to medium high.
Place pork tenderloins over direct, medium-high heat and grill about 6 minutes per side. Pork tenderloin has three sides, so this will total about 18 minutes. Cook to an internal temperature of 140 to 145 degrees. Let rest 5-10 minutes before slicing.
Top with chimichurri sauce and serve.
Notes
Pork tenderloin is very easy to grill. Remember that it actually has three sides. Cooking time will vary slightly according to size, but on average, I grill mine over medium-high heat about 6 minutes per side for a total of 18 minutes on the grill.
The longer the chimichurri sauce sits, the spicier it will get, so if you don't like a lot of spice, start with less crushed red pepper. You can always add more.
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