Steak Fajitas with Onions and Peppers

Name: Steak Fajitas with Onions and Peppers
Ingredients: 1 tablespoon paprika; 2 teaspoons packed light brown sugar; 1 teaspoon ground cumin; 1 1/2 teaspoons chili powder; 1/2 teaspoon ancho chile powder; 1/2 teaspoon garlic powder; Kosher salt; 1 1/2 pounds skirt steak; Juice of 3 limes, plus wedges for serving; 3 tablespoons extra-virgin olive oil, plus more for the grill; 4 bell peppers (red, orange and/or yellow), thinly sliced; 2 red onions, thinly sliced; 8 to 12 flour tortillas; Shredded cheddar cheese and chopped fresh cilantro, for topping