Beef tenderloin, red-ripe plum tomatoes, Bermuda onions and Anaheim chili peppers – individually skewered and grilled to perfection.
Step 1 : Cut the tenderloin crosswise into 1-inch-thick slices. Place the slices flat on the cutting board and cut into 1-inch-wide strips. Cut each strip crosswise into 1/2-inch thick pieces. Thread the beef onto the skewers and place them on a large nonreactive platter.
Step 2: Puree the onion in a food processor. Strain the resulting puree over the kebabs, turning to coat all sides. Using a fork, beat the lime juice, oil, pepper, and salt in a small bowl, then pour the mixture over the kebabs, again turning to coat on all sides. Marinate for 15 minutes.
Step 3: Skewer peppers, tomatoes, and wedged onion.
Step 4: Meanwhile, preheat the grill to high.
Step 5: When ready to cook, oil the grill grate. Drain the beef kebabs, arrange on the hot grate, and grill until cooked to taste, 1 to 2 minutes per side (4 to 8 minutes in all; Iranians like their beef on the medium side of medium-rare). Grill the skewered vegetables until tender (they will take about the same amount of time as the beef kebabs). Transfer the kebabs to a platter. With the butter on the end of a fork for easy handling, rub it over each kebab. Serve immediately.