1-First Step: Prep the ingredients Start by cutting the 1 pound top sirloin steak into even cubes so the pieces cook at the same speed. Next, cut the 1 red bell pepper, 1 yellow bell pepper, and 1 red onion into squares that are large enough to stay on the skewer. Try to keep the pieces similar in size so the kabobs look neat and cook evenly. If you are using wooden skewers, soak them in water for about 20 to 30 minutes before grilling. This helps prevent burning. Metal skewers work great too and save a little time.

2-Second Step: Make the marinade In a medium bowl, whisk together the 1/4 cup olive oil, 1/2 tablespoon lime juice, and 3 tablespoons fajita seasoning or 1.2 ounce package. Stir until the mixture looks well blended. The oil helps carry the seasoning onto the steak, while the lime juice gives the meat a fresh flavor. Add the steak cubes to the bowl and toss until each piece is coated. If you have time, let the steak marinate for at least 20 to 30 minutes. For a deeper flavor, you can refrigerate it for up to 2 hours. Do not marinate too long if your seasoning blend is very salty.

3-Third Step: Assemble the kabobs Thread the marinated steak, red bell pepper, yellow bell pepper, and red onion onto the skewers, alternating the ingredients as you go. This not only makes the kabobs look pretty, but it also helps the vegetables and steak cook together in a balanced way. Leave a little space between each piece so heat can move around the food. If you like, you can make each skewer the same pattern. For example, steak, pepper, onion, steak, pepper, onion. That makes serving easier and gives you even-looking kabobs for the dinner table.

4-Fourth Step: Heat the grill Preheat your grill to medium-high heat, about 400 to 450°F. If you are using a grill pan indoors, set it over medium-high heat and let it get hot before the kabobs go on. A hot surface helps the steak sear and gives the vegetables those tasty browned edges. Lightly oil the grates or the pan so the kabobs do not stick. This small step can make flipping much easier.

5-Fifth Step: Grill the kabobs Place the kabobs on the hot grill and cook for about 8 to 12 minutes total, turning every 2 to 3 minutes so all sides cook evenly. The exact time will depend on the size of your steak cubes and how done you like your meat. For medium doneness, aim for an internal temperature of 135 to 140°F, then let the kabobs rest before serving. The peppers and onion should be tender with a little char, while the steak should be browned on the outside and juicy inside. If a skewer has larger pieces, it may need an extra minute or two.

6-Final Step: Rest and serve Take the kabobs off the grill and let them rest for 5 minutes. This gives the juices time to settle back into the steak. Serve them hot with rice, tortillas, beans, or your favorite side dish. You can also slide the ingredients off the skewers and tuck them into warm tortillas for easy steak fajita tacos.