Mustard-crusted roast potatoes

1. Heat the oven: Position a rack in the center of the oven and heat to 400 degrees. If desired, line a heavy-duty rimmed baking sheet with parchment paper.

2. Make the coating: in a large mixing bowl, whisk together the mustard, olive oil, lemon juice, garlic, rosemary, crushed red pepper flakes, salt and pepper to taste. Add the potato cubes and toss to coat.

3. Roast and serve: Transfer the potatoes to the baking sheet and spread them in a single layer. Scrape the bowl with a rubber spatula and drizzle any leftover coating onto the potatoes. Roast, tossing with a spatula a few times and shaking to restore an even layer, until the potatoes are crusty on the outside and tender throughout, 50 to 55 minutes. Serve hot.