indian-style beef kebabs with cilantro sauce

I don't do beef often - but when I do, I like to do it right. This recipe, in my book, does beef right.

INDIAN-STYLE BEEF KEBABS WITH CILANTRO SAUCE

1 bunch cilantro
1 small onion, peeled
2 cloves garlic, peeled
1 small green chili pepper, trimmed & halved, with seeds
1 2-inch piece fresh ginger, peeled
1 1/4 tsp kosher salt
4 tbsp vegetable oil
3 tbsp fresh lime juice
1/2 tsp curry powder
1 1.5 lb rib-eye steak, cut into 24 1 inch chunks
1 medium red onion, peeled
4 pieces naan bread

Place cilantro, small onion, garlic, chili, ginger & salt with 3 tbsp of the oil in a food processor. Process until a paste is formed. Transfer to a large bowl. Put 2 tbsp of the paste in a small bowl and stir in the lime juice to make the cilantro sauce. Cover & set aside. Stir the curry powder into the remaining paste. Add the steak and coat well. Cover & marinate at room temp for 20 minutes. Cut the red onion into 6 wedges and separate each wedge into 2 layers. Thread the beef & onion chunks onto 8 skewers. Brush a grill pan with the remaining oil, grill the kebabs for 8 to 10 minutes, turning them every 2 minutes. Serve with the cilantro sauce and naan.