🌮 Grilled Steak Fajitas Recipe | Sizzling Tex-Mex Fajitas on a Gas BBQ

🌮 Sizzling Steak Fajitas on a Gas BBQ

There's something special about serving sizzling steak fajitas straight from the barbecue. Tender strips of marinated steak, sweet charred peppers and onions, and warm tortillas come together to create a vibrant, crowd-pleasing meal that's perfect for sharing.

Cooking everything on a gas BBQ makes it easy to achieve beautifully caramelised vegetables and juicy steak while keeping all the cooking outdoors. The quick, high-heat method locks in flavour and gives the steak delicious charred edges without overcooking it.

Whether you're hosting a relaxed summer gathering or looking for a fun alternative to burgers, these steak fajitas are colourful, full of flavour and easy for everyone to customise with their favourite toppings.

📝 Recipe Overview

Prep Time: 20 minutes (plus 1 hour marinating)

Cook Time: 12–15 minutes

Total Time: Around 1 hour 35 minutes

Serves: 4

Difficulty: Easy

🛒 Ingredients

For the Steak

  • 700g rump or flank steak
  • 2 tbsp olive oil
  • Juice of 1 lime

Fajita Marinade

  • 2 tsp smoked paprika
  • 2 tsp ground cumin
  • 1 tsp garlic granules
  • 1 tsp onion granules
  • ½ tsp chilli powder
  • ½ tsp dried oregano
  • 1 tsp sea salt
  • ½ tsp freshly ground black pepper

Vegetables

  • 2 red peppers, sliced
  • 1 yellow pepper, sliced
  • 2 red onions, sliced
  • 1 tbsp olive oil

To Serve

  • 8 flour tortillas
  • Guacamole
  • Sour cream
  • Fresh salsa
  • Grated mature cheddar
  • Fresh coriander
  • Lime wedges

🔥 Equipment Needed

  • Gas BBQ
  • Cast iron griddle or BBQ plate
  • BBQ tongs
  • Sharp knife
  • Mixing bowls

👨🍳 Method

Step 1 – Marinate the steak

Mix the olive oil, lime juice and all the marinade ingredients together.

Coat the steak evenly and refrigerate for at least one hour.

Step 2 – Prepare the vegetables

Toss the sliced peppers and onions with olive oil.

Season lightly with salt and pepper.

Step 3 – Prepare the barbecue

Preheat the gas BBQ to a medium-high heat of approximately 220°C.

Place a cast iron griddle or BBQ plate over the heat.

Step 4 – Cook the steak

Cook the steak for approximately 3–4 minutes per side, depending on thickness, until cooked to your preferred doneness.

Transfer to a board and rest for 8–10 minutes.

Step 5 – Cook the vegetables

Place the peppers and onions onto the hot griddle.

Cook for around 8–10 minutes, stirring occasionally until lightly charred but still slightly crisp.

Step 6 – Warm the tortillas

Wrap the tortillas in foil and place them on the BBQ warming rack or indirect heat for around 3–4 minutes.

Step 7 – Assemble

Slice the rested steak thinly against the grain.

Serve alongside the charred vegetables, warm tortillas and your favourite toppings, allowing everyone to build their own fajitas.

💡 Cooking Tips

  • Flank or rump steak works beautifully as both remain tender when sliced correctly.
  • Always slice the steak against the grain.
  • Avoid overcooking the peppers so they retain a little crunch.
  • Rest the steak before slicing to keep it juicy.
  • Fresh lime juice brightens the finished dish.

🌟 Delicious Variations

Chicken Fajitas

Replace the steak with boneless chicken thighs.

Halloumi Fajitas

Swap the steak for grilled halloumi for a delicious vegetarian alternative.

Smoky BBQ Fajitas

Add smoked chipotle sauce to the marinade.

Surf & Turf Fajitas

Add grilled king prawns alongside the steak.

Spicy Steak Fajitas

Increase the chilli powder and add fresh jalapeños.

🍽️ What to Serve with Steak Fajitas

These fajitas pair perfectly with:

  • Mexican rice
  • Black beans
  • Corn on the cob
  • Guacamole
  • Pico de gallo
  • Loaded nachos
  • Grilled sweetcorn salad
  • Churros for dessert

🥡 Storage & Leftovers

Store the cooked steak and vegetables separately in airtight containers in the refrigerator for up to 3 days.

Reheat gently before serving in fresh tortillas, over rice or as part of a salad bowl.

❓ Frequently Asked Questions

What's the best steak for fajitas?

Rump and flank steak are both excellent choices as they remain tender and full of flavour when sliced thinly.

Can I cook this on a charcoal BBQ?

Yes. A charcoal BBQ will add an extra smoky flavour to both the steak and vegetables.

Should I marinate the steak overnight?

It's not essential, but marinating overnight will develop even deeper flavour.

Can I prepare everything in advance?

Yes. The vegetables can be sliced and the marinade prepared a day ahead for easy cooking.

How do I stop the steak becoming tough?

Avoid overcooking it and always slice against the grain after resting.

🛍️ Shop the Equipment at Sal's Place

A gas BBQ offers excellent heat control, making it ideal for quickly cooking steak while charring vegetables to perfection. If you're planning your next outdoor feast, you can explore our range below.

🔗 Explore Gas BBQs at Sal's Place

🔗 Explore BBQ Accessories at Sal's Place

🔗 Explore All BBQs at Sal's Place

Whether it's a casual family dinner or a lively garden gathering, these sizzling steak fajitas are guaranteed to bring everyone together around great food and plenty of flavour.