Greek Steak Pitas

• 1/2 cup red wine vinegar
• 1 teaspoon all purpose Greek seasoning (such as McCormick)
• 1/8 teaspoon black pepper
• 1 (1 lb) flank steak, trimmed
• 1/2 teaspoon kosher salt, divided
• 1 teaspoon butter
• 1 teaspoon olive oil
• 2 tablespoons lemon juice
• 1 teaspoon minced garlic
• 1 (6 ounce) package fresh Baby Spinach
• 4 (6 inch) pita bread, cut in half
• 1/2 cup thinly sliced red onion
• 24 slices English cucumbers
• 1/2 cup crumbled feta cheese

1. Combine first 3 ingredients in a large zip-top plastic bag; add steak to bag. Marinate 3 minutes, turning once. Remove steak from bag; discard marinade. Sprinkle steak with 1/4 teaspoon salt. Heat a large skillet over medium-high heat. Add butter and oil. Add steak; cook 5 minutes on each side or until desired doneness. Let stand 2 minutes. Cut steak across grain into thin slices.
2. Return pan to heat. Add juice, garlic, and spinach; saute 1 minute. Remove from heat; add remaining salt.
3. Spoon 2 tablespoons spinach mixture into each pita half. Place 1 tablespoon onion, 3 cucumber slices, and 1 1/2 ounces steak in each pita half; sprinkle 1 tablespoon cheese in each pita half.

red wine vinegar, black pepper, flank steak, kosher salt, butter, olive oil, lemon juice, garlic, spinach, pita bread, red onion, cucumbers, feta cheese

Taken from www.food.com/recipe/greek-steak-pitas-372557 (may not work)