Preheat the oven to 450 degrees F.
For the chimichurri dressing: In a food processor, pulse together the oil, vinegar, herbs, salt, black pepper and red pepper flakes. Set aside.
For the rainbow potatoes: Toss the potatoes in the oil to coat, then spread them out on a baking sheet. Roast for about 30 minutes, until crispy and cooked through.
For the beef tenderloin: Coat the tenderloin in the olive oil, then rub with the salt, coriander and cumin. Roast for 15 to 20 minutes, until rare to medium-rare. Let rest before thinly slicing.
For the Parmesan crisp: Raise the oven temperature to 500 degrees F. Place the Parmesan slices on a silicone baking mat and bake for 5 minutes.
To serve: Arrange some tenderloin slices and potatoes on a plate, drizzle with chimichurri and top with a Parmesan crisp.
This recipe was created by a contestant during a cooking competition. It has not been tested for home use.