Combine olive oil, lime juice, and fajita seasoning in a small measuring cup and whisk until smooth.

Marinate the steak in the mixture for at least 30 minutes, ensuring all pieces are coated.

Preheat your grill to medium heat, about 350°F.

Assemble the kabobs by threading steak and veggies onto skewers, packing tightly but not overcrowding.

Grill kabobs for about 12 minutes, turning every 3-4 minutes for even cooking.

Let the kabobs rest for a couple of minutes before serving, optionally with warm tortilla shells.