Pork and fruit is a classic combination, nearly as old as time, and this recipe is no exception. Here, we’ve quickly allowed lean pork tenderloin to mingle with a sweet mustardy marinade before getting roasted and sliced and served with a hearty fall salad loaded with sweet oranges and tart apples.
Preheat the oven to 425˚ F. Season the pork all over with salt and pepper. Combine the mustard, maple syrup, sage, 2 tablespoons lemon juice and 1 tablespoon olive oil. Rub all over the pork and set aside to marinate while you prepare the salad.
Meanwhile, with a sharp paring knife, remove the peel and pith from the oranges. Working over a large bowl, cut along the membranes to remove the segments. Squeeze the membranes to release any remaining juice into the bowl. Add the apple, radicchio, parsley, walnuts and remaining 1 tablespoon each olive oil and lemon juice to the bowl. Season with salt and pepper and toss to combine.
Line a rimmed baking sheet with nonstick foil. Add the pork to the pan and drizzle with any remaining marinade. Roast until a thermometer inserted into the center of the pork registers 135˚ F, 15 to 20 minutes. Switch the oven to broil and broil until the marinade is browned, about 2 minutes. Transfer the pork to a cutting board and let rest 5 minutes.
Slice the pork and serve with the apple and orange salad.