Crispy Smashed Potatoes With Tonnato Sauce

Ingredients

For 6 servings

• •2 pounds (900 g) small yellow potatoes (see notes)
• •Kosher salt
• •3 or 4 sprigs fresh thyme
• •Extra-virgin olive oil, for pan-frying
• •1 large egg
• •1 /4 cup (60 ml) fresh lemon juice (from 2 whole lemons), divided
• •2 anchovy fillets (about 1/4 ounce; 7 g)
• •1 c. à café (5 ml) Dijon mustard
• •1 c. à café (5 g) capers, drained
• •1 /2 cup (120 ml) vegetable oil
• •1 /2 cup (120 ml) extra-virgin olive oil
• •4 ounces (113 g) oil-packed tuna, such as Ortiz, drained
• •Kosher salt and freshly ground black pepperFor the Parsley Sauce:
• •1 ounce (30 g) flat-leaf parsley leaves and tender stems
• •1 /2 cup (120 ml) extra-virgin olive oil
• •Kosher salt
• •1 /4 cup pitted olives, such as Taggiasca or Gaeta (see notes)
• •About 3 tablespoons minced Quick-Pickled Red Onion
• •About 2 tablespoons chopped Calabrian chiles in oil or other jarred chiles in oil (see notes)

Method

1. 1.For the Potatoes: In a large pot, cover potatoes with cold water, season heavily with salt, and add thyme. Bring to a boil over high heat , then reduce heat to a gentle simmer and cook until potatoes are completely tender, about 10 minutes after a boil is achieved (poke a potato with a sharp knife or cake tester to test for doneness). Drain in a colander set in the sink and let rest for 10 minutes to dry and cool slightly.
2. 2.Working with one potato at a time, place potato on cutting board and smash firmly with the bottom of a heavy skillet to a thickness of about 1/2 inch. Transfer to a large plate or tray as you work.
3. 3.In a large nonstick or cast iron skillet, heat about 1/4 inch of olive oil over medium heat until shimmering. Add as many potatoes as will fit in a single layer. Cook, shaking pan occasionally, until bottom side is deep golden brown, about 6 minutes. Carefully flip with a thin metal spatula and cook until second side is golden brown and crisp, about 5 minutes longer. Transfer to a paper towel-lined plate and allow to drain.
4. 4.Continue cooking potatoes in batches, adding more oil as necessary, until all potatoes are cooked. Potatoes can then be left aside until ready to serve.
5. 5.While the potatoes are boiling, make the Tonnato Sauce: Place egg, 2 tablespoons (30ml) lemon juice, anchovies, mustard, and capers in a blender or food processor and, with the processor or blender running, slowly drizzle in vegetable oil followed by the olive oil until oil is fully emulsified and a mayonnaise has formed.
6. 6.Turn off processor or blender and scrape down sides of cup using a rubber spatula, then add tuna and remaining 2 tablespoons (30ml) lemon juice. Process or blend just until tuna is thoroughly incorporated into a smooth sauce, 15 to 30 seconds. Avoid over-blending, as this can cause the sauce to become grainy. Transfer tonnato sauce to a medium bowl and season with salt and pepper. Rinse out processor or blender jar.
7. 7.For the Parsley Sauce: In the rinsed processor or blender, combine parsley with oil and blend until a fairly smooth sauce forms. Season with salt.
8. 8.To Serve: On a large platter, spread a generous layer of tonnato sauce all over. Arrange potatoes on top (if they've cooled and you want to serve them warm, you can reheat them in a 400°F oven for about 6 minutes). Spoon some generous spoonfuls of parsley sauce on top along with a scattering of the olives, minced pickled onions, and chiles in oil. Serve. (Note, you will have leftovers of the sauces.)