Grilled Beef Kebabs with Tzatziki

5 from 3 votes

Grilled Beef Kebabs with Tzatziki

Juicy grilled beef kebabs with colorful veggies and creamy tzatziki. The ultimate summer dinner, perfect for grilling season and easy entertaining.

Prep Time15

Cook Time12

Total Time27

Course: Dinner

Cuisine: Mediterranean, American, Turkish, Greek

Servings:

Author: Gaby Dalkin

Ingredients

1.5 lbs beef sirloin tips cut into 1 ½-inch cubes
3 tablespoon olive oil
2 tablespoon red wine vinegar
1 tablespoon granulated garlic
1 teaspoon ground cumin
1 teaspoon sweet paprika
1 teaspoon dried oregano
Kosher salt and freshly cracked black pepper
1 sweet onion cut into 1 ½-inch pieces
1 red bell pepper cut into 1 ½-inch pieces
1 yellow bell pepper cut into 1 ½-inch pieces
1 orange bell pepper cut into 1 ½-inch pieces
Tzatziki

Instructions

In a large bowl or zip-top bag, combine the beef, olive oil, red wine vinegar, garlic, cumin, paprika, oregano, salt, and pepper. Toss well to coat. Cover and marinate in the refrigerator for at least 4 hours, ideally 6 to 8.
Preheat a gas or charcoal grill to medium-high heat.
Thread the marinated beef onto skewers, alternating with onion and bell pepper pieces.
Grill the kebabs over direct heat, turning every 3 to 4 minutes, until the beef is charred and cooked to medium or your desired doneness, about 10 to 12 minutes total.
Transfer to a platter and let rest for 5 minutes. Serve with chilled tzatziki.

Notes

Marinate for a minimum of 4 hours, but overnight is the real move. The red wine vinegar in the marinade works as an acid tenderizer, breaking down muscle fibers in the sirloin. More time means deeper penetration of the garlic, cumin, and paprika into the meat, not just the surface.
Pat the beef dry before threading it onto skewers. Excess marinade on the surface of the beef creates steam on the grill instead of a sear. A quick pat with paper towels gives you that caramelized, slightly charred crust that makes kebabs actually delicious.
Cut beef and vegetables to exactly 1.5 inches, no guessing. Inconsistent sizing means some pieces overcook while others are still raw. Uniform cuts ensure the beef and vegetables finish at the same time on the grill.
Soak wooden skewers in cold water for at least 1 hour before using. Dry wood ignites quickly over direct high heat. Thoroughly soaked skewers resist burning long enough to get through the full 10 to 12 minute cook time without becoming a liability.
Do not pack the skewer too tight. Pieces that are pressed tightly together trap steam between them and those spots never get direct grill contact. Leave a tiny gap between each piece so heat can circulate and every surface has a chance to char.
Preheat your grill to medium-high and make sure the grates are clean and oiled. Cold or dirty grates cause sticking, which tears the meat when you try to turn the kebabs. A well-oiled, hot grate releases cleanly and gives you those defined grill marks.
Turn the kebabs every 3 to 4 minutes on a strict rotation. Kebabs have multiple flat sides and each one needs direct heat exposure. Consistent turning builds even char all around rather than burning one side and leaving the others pale and steamed.
Pull the beef at medium doneness (around 135 to 140 degrees F internal). Sirloin tip is a lean cut with minimal fat marbling. Cooking it past medium results in a dry, tough texture because there is not enough intramuscular fat to keep it moist at higher temperatures.
Rest the kebabs on a warm platter for 5 full minutes before serving. Resting allows the muscle fibers to relax and reabsorb juices that were pushed to the center during cooking. Cut into them too early and those juices run out onto the platter instead of staying in the meat.
Keep the tzatziki cold right up until the moment you serve it. The contrast between hot charred beef and ice-cold tzatziki is the entire point of this dish. A warm or room-temperature dip kills that sensory payoff completely.
Use metal skewers if you grill kebabs regularly. Metal skewers conduct heat from the inside out, helping the center of each beef cube cook more evenly. They also never burn, do not require soaking, and hold up to heavier cuts of meat without bending.
Let the marinade do the seasoning work and skip adding extra salt post-grill. The marinade already includes kosher salt and the reduction of moisture during grilling concentrates those flavors significantly. Over-salting after the fact is a common mistake that makes the finished kebab taste sharp rather than savory.

Nutrition (estimated)