Ingredients
4 hanger steaks (6 ounces each), room temperature
Coarse salt and freshly ground pepper
6 tablespoons plus 2 teaspoons extra-virgin olive oil
3 ounces creamy blue cheese, sliced into 4 pieces
1 large sweet onion, 1/2 coarsely chopped, 1/2 thinly sliced
3 cloves garlic, minced (1 tablespoon)
3 tablespoons sherry vinegar
4 beefsteak or heirloom tomatoes, 2 coarsely chopped, 2 sliced
2 teaspoons whole-grain Dijon mustard
2 teaspoons chopped fresh oregano, plus leaves for serving
1 small head iceberg lettuce, quartered lengthwise
Preparation
Season steaks with salt and pepper; let stand 10 minutes. Heat a large skillet over medium-high; swirl in 2 teaspoons oil. Cook steaks, turning a few times, until browned all over, 8 to 10 minutes for medium-rare. Transfer to a plate; top each with a cheese slice.
Lower heat to medium. Add 2 tablespoons oil, chopped onion, and garlic to skillet; cook 1 minute. Add vinegar; bring to a simmer, scraping up browned bits. Stir in chopped tomatoes; simmer until they release their juices, about 5 minutes. Stir in remaining 1/4 cup oil and juices from steak plate; strain through a sieve. Whisk in mustard and oregano; season with salt and pepper. Season lettuce and tomato and onion slices with salt and pepper, drizzle with vinaigrette, and top with oregano leaves; serve, with steaks.
