Place the steak in a 9x13 pan or Ziploc bag and squeeze fresh lime juice over it, making sure the entire steak is covered. Let sit for 30 minutes.
In a small bowl, combine lime zest, salt, sugar, black pepper, chili powder, cumin, paprika, oregano, and cinnamon. Sprinkle mixture over steak and rub into the meat. Let sit for an additional 10 minutes. Place peppers and onions in a large bowl. Drizzle with olive oil, lime juice, chili powder, cumin, paprika, garlic powder, salt, and pepper.
Preheat the grill to medium high heat. Place steak directly on the grill and cook for 4-5 minutes on each side. Remove from grill and let the steak rest on a cutting board for 10 minutes. While the steak is resting, grill the vegetables. Put the vegetables on a grill pan and cook until tender, stirring occasionally, about 7-10 minutes. Remove from grill and set aside.
Cut the steak into strips. Place steak and vegetables in a flour tortilla and top with desired toppings. Serve warm.
Note-you can heat the tortillas up right on the grill!