Steak Tostadas with Cilantro Sour Cream

By Jillh929

Ingredients

• 4 flour tortillas (6-inch)
• 1 cup shredded Manchego cheese (4 ounces)
• Reserved 2 cups mushrooms and steak, thinly sliced against the grain, from Seared Steak with Roasted Mushrooms and Spinach Salad
• 1 package (10 ounces) frozen corn kernels, thawed and patted dry
• 4 scallions, thinly sliced
• Coarse salt and ground pepper
• 1/2 cup reduced-fat sour cream
• 1/4 cup chopped cilantro, plus more for garnish
• 2 tablespoons fresh lime juice, plus lime wedges for garnish
• 2 pounds white mushrooms, trimmed and quartered
• 4 garlic cloves, thinly sliced
• 5 tablespoons olive oil
• Coarse salt and ground pepper
• 1 tablespoon paprika
• 1 teaspoon dried oregano
• 1/2 teaspoon red-pepper flakes
• 2 flank steaks (1 1/2 pounds each)

Details

Servings 4

Preparation

Step 1

Steak and Mushrooms

1.Preheat oven to 475 degrees, with racks in upper and lower thirds. Divide mushrooms, garlic, and 1 tablespoon oil between two large rimmed baking sheets; season with salt and pepper, and toss. Roast, tossing occasionally, until mushrooms are tender and browned, 15 to 20 minutes. Refrigerate 2 cups for Tostadas, up to 2 days. Set aside remaining mushrooms.

2.In a small bowl, combine paprika, oregano, red-pepper flakes, and 2 teaspoons salt. Rub steaks with 1 tablespoon oil, then spice mixture.

3.In a large skillet, heat 1 tablespoon oil over medium-high. Sear steaks in two batches, 5 to 7 minutes per side for medium-rare (lower heat if skillet gets too dark). Transfer steaks to a plate; refrigerate one steak for Tostadas, up to 2 days. Tent remaining steak with aluminum foil to keep warm.

Tostadas

1.Preheat oven to 475 degrees. Line a large rimmed baking sheet with aluminum foil. Place tortillas on sheet (it's fine if they overlap); sprinkle with cheese. Bake until edges are golden, 4 to 6 minutes.

2.Meanwhile, in a large bowl, toss together steak, mushrooms, corn, and scallions; season with salt and pepper. Top tortillas with steak mixture. Bake until warmed through, 6 to 8 minutes.

3.Meanwhile, in a small bowl, stir together sour cream, cilantro, and lime juice; season with salt and pepper. Serve tostadas topped with cilantro sour cream and garnished with cilantro and lime wedges.