Savory Skirt Steak Quesadillas

Ingredients

• 1 teaspoon black pepper
• 2 tablespoons olive oil
• 2 cups shredded mozzarella and Monterey Jack cheese blend
• guacamole
• 1/2 teaspoon garlic powder
• 1/2 teaspoon ground cumin
• 1 lb skirt steak
• 1 teaspoon onion powder
• sour cream
• 1 medium onion, thinly sliced
• 2 teaspoons kosher salt
• 10 medium flour tortillas