Get your largest bowl, you will need it, this salad makes a large amount of salad. Slice Napa cabbage into 1/4 inch slices, you may want to roughly chop the cabbage again so the pieces aren't too large. Slice green onion tops and add to the bowl.
Melt butter in a large saucepan, add Ramen noodles to saucepan breaking them as you put them into the saucepan. The most difficult part of this recipe is browning the noodles, and not burning them. It doesn't take long before the noodles are burnt, it seems to happen only a second or two after they are toasted, watch them carefully.
Add toasted Ramen noodles to the salad. Add slivered almonds to salad, use your hands and toss the cabbage, green onions, toasted ramen noodles, and almond slivers well.
For the Dressing
To make the dressing, use a medium-sized bowl, or a shake bottle if you have it, add sugar, vinegar, dry ginger, dry mustard powder, Worcestershire sauce, and vegetable oil.
Whisk thoroughly, it may seem the sugar won't dissolve, it will. Once the sugar as completely dissolved pour over slaw and mix well.
If you want to substitute the sugar, you can try Equal or Splenda to avoid the sugar calories.
Since you are only using the green part of the onion, set aside the white side for another recipe.
When mixing the dressing, try using a dressing shaker. This makes mixing the ingredients so much easier and you can store it in the container when you are done.