How to Make It
Light a grill. In a small glass baking dish, mix the peanut oil with the kecap manis. Season the steak with salt and pepper, add it to the dish and turn to coat. Let stand at room temperature for 30 minutes.
In a small bowl, mix the fish sauce with the lime juice, red pepper flakes, brown sugar, cilantro and shallot.
Grill the steak over moderately high heat, turning once, until medium-rare, about 6 minutes. Transfer to a cutting board and let rest for 5 minutes. Thinly slice the steak across the grain. Mound the cabbage on plates, top with the sliced steak and serve the sauce on the side.
Kecap manis is a thick, slightly sweet Indonesian seasoning with a soybean base. Look for it at Asian markets or online at indomart.us.