Preheat a cast iron grill skillet on medium - high. One with ridges and grooves. This will let any liquid drain away from the meat and give a sear edge to the steak.
Saute the onions and peppers with 1 tablespoon of oil to prevent sticking. Add the lime juice, soy sauce, and the water. Cook for about 5 minutes. Salt to taste and transfer to a plate or bowl.
1 tablespoon soy sauce, 1-2 tablespoon olive oil, 2 tablespoon water, salt to taste
Remove the steak from the marinade. Pat it dry with paper towels. Season with salt & pepper.
salt to taste, pepper to taste
In the empty skillet, add the other 1 tablespoon of olive oil. Heat to medium - high. Add the steak that you patted dry earlier. Sear on both sides for about 4 minutes per side. Remove to a cutting board and slice thinly on the cross grain.
1 large onion, sliced, 1 red bell pepper, sliced, 1 yellow bell pepper, sliced, 1 green bell pepper, sliced, 1-2 tablespoon olive oil, 1 tablespoon soy sauce, 1 teaspoon lime juice
Add back to the skillet, but turn the heat off. Add the sauteed onions and bell peppers. Toss to mix well and serve. Use a heat proof trivet if placing the skillet on the table or counter.
Serve with hot steamed flour tortillas, lime wedges, chopped cilantro, sour cream, guacamole, and pico de gallo to create a Fajita meal.