What you need -- a variety of chopped vegetables** such as broccoli, celery, onion, garlic, bok choy, bean sprouts, leeks, and cabbage. Prepare veggies as for Nasi. Also 1 package 375gr of medium noodles, Sambal Oelek, Ketjap, and 2 packets of Bahmi spices, or 1 tbs of your own spice blend*; and oil for cooking.
*Usually includes curry powder, ginger, coriander, cumin, turmeric, onion powder and garlic powder, with salt and pepper.
Whay you do -- heat oil in a large saute pan or deep skillet, and stir fry veggies until just done. Meanwhile cook noodles according to package directions. Drain noodles, and place back into cooking pot. Add all the cooked vegetables, and spices. Stir well. Adjust seasonings to taste. Can be added as is to your buffet for Rijsttafel, or used as the base for a meal with added cooked meat, or served with beef saté or Babi kekap.
** I tend to use more white and orange vegetables for Nasi and green ones for Bahmi, but you can use anything you please. You can also add mushrooms to any of these, which, of course, I can't do.