Step 1: Cut each steak, including the fat, into 1/2-inch cubes and place in a nonreactive mixing bowl. Stir in the sugar, coriander, turmeric, cumin, pepper, fish sauce, and vegetable oil. Marinate the beef, covered, in the refrigerator for at least 3 hours and as long as overnight.
Step 2: Thread the beef cubes onto bamboo skewers, leaving the bottom half of each skewer exposed as a handle. The recipe can be prepared several hours ahead to this stage.
Step 3: Set up your grill for direct grilling and preheat to high. Brush and oil the grill grate.
Step 4: Arrange the sates on the grate, sliding the grill shield or folded foil under the exposed part of the skewers to keep them from burning. Grill until cooked to taste, 1 to 2 minutes per side for medium rare, a little longer for medium. (In general, Southeast Asians eat their sates medium to medium-well.) Serve with your favorite spicy peanut sauce.
The traditional way to eat sate is to skewer a piece of cucumber on the pointed end of the skewer, then dip the sate in peanut sauce.