Sizzlin' Fajitas

Place the steak in a glass or ceramic baking dish. In a food processor or blender, purée the green onions, jalapeño, cilantro, 3 tablespoons of the oil, lime juice, salt, and pepper. Pour the mixture over the steak and turn to coat both sides evenly. Cover and marinate at room temperature for 1 to 2 hours, turning at least once.

Wrap the tortillas in foil and warm in the oven at 150 degrees F while you cook the steak and vegetables.

Preheat a grill pan over medium heat until very hot. Brush the peppers and onions with the remaining tablespoon of olive oil. Add the vegetables to the grill pan and cook, turning often with tongs until softened, about 4 minutes. Transfer to a glass or nonreactive metal bowl and cover to keep warm. Drain the marinade from the steak, place the steak in the hot grill pan, and grill for 4 minutes. Turn and cook until seared and nicely browned. Transfer the steak to a cutting board and cover loosely with foil. Let rest for 5 minutes, and then carve the meat across the grain into 1/4-inch thick slices. Cut these slices lengthwise in thirds and season with salt. Arrange the meat on a platter with the peppers and onions. Serve with the avocado, salsa, and the warmed tortillas, wrapping a few pieces of meat and some vegetables inside each one.