Dinner: Open-Face Steak Sandwich With Parmesan Dressing

Recipe by Claire Saffitz Mark your calendar: It’s steak sandwich night in America. (Feeling virtuous? Remove the bread and…voilà: steak salad!)

This recipe includes superfoods such as:

Lemon

Health benefits of Open-Face Steak Sandwich With Parmesan Dressing

Lemons can help to prevent oxidative damage to the body, which women with PCOS are often susceptible to. Lemons are also rich in vitamin C, flavonoids, and other antioxidants. They can potentially support the immune system and have other health benefits. Lemons also have a low glycemic index, so they should not cause a rapid rise in blood sugar when consumed in natural form.

Ingredients

1 1/2 pounds flank steak
Kosher salt, freshly ground pepper
1 tablespoon vegetable oil
1/2 small red onion, thinly sliced
1/4 cup whole grain mustard
3 tablespoons fresh lemon juice
1/2 cup olive oil, plus more for bread
1 1/2 ounces Parmesan, finely grated
1 ciabatta loaf, halved lengthwise
6 cups mature arugula leaves with tender stems

Instructions

Heat a dry large skillet, preferably cast iron, over medium-high. Using a sharp knife, lightly score steak on both sides in a crosshatch pattern. Season generously with salt and pepper, then rub all over with vegetable oil. Cook steak, turning once or twice to brown evenly, until medium-rare and lightly charred, 8 −10 minutes. Transfer steak to a cutting board and let rest at least 15 minutes; reserve skillet.
Meanwhile, place onion in a small bowl; cover with cold water. Set aside.
Blend mustard and lemon juice in a blender to combine. With motor running, stream in 1/2 cup olive oil, then gradually add Parmesan. Stream in 1 Tbsp. cold water and blend until dressing is smooth and thick. Season with salt and pepper.
Heat reserved skillet over medium. Drizzle cut sides of ciabatta with olive oil. Working with 1 half at a time, cook, cut side down, until golden brown and crisp, about 5 minutes each.
Place bread, cut side up, on a platter and drizzle with one-third of dressing. Top with arugula; drain reserved onion and scatter over arugula. Season with salt and pepper and drizzle with half of remaining dressing. Thinly slice steak and arrange over dressed arugula. Drizzle with remaining dressing, season with more salt, then cut sandwiches crosswise into pieces.