In large skillet melt butter over medium heat. Add sesame seed, noodles, almonds and sugar. Stir all the time until lightly browned. Set aside to cool to room temperature. Toss bok choy and onions together, mix and chill until ready to serve. Just before serving, break up the crunchy mixture, add to bok choy, pour dressing over, mix and serve.
DRESSING:
3/4 c. vegetable oil
1/4 c. red wine vinegar
1/2 c. white sugar
2 tbsp. soy sauce
Mix well and chill until ready to use.