LOVE THIS, found it on simplyrecipes.com (steak version only, chicken was my idea), there are never any left overs...ever. Also great with chicken... when I am dying for this in the winter, I use the broiler. :)
Mince garlic and mash to a paste with salt. Transfer to a blender and add remaining sauce ingredients, then blend until smooth.
Stir together cumin, salt, and pepper in a small bowl. Pat steak dry, then rub both sides of pieces with cumin mixture.
Heat an oiled well-seasoned ridged grill pan over high heat until hot but not smoking, then grill steak in 2 batches, turning over occasionally, about 2 minutes per batch for thin pieces or 6 to 8 minutes per batch for thicker pieces (medium-rare). Serve steak drizzled with sauce.