In a large skillet, melt butter and 1 tblspn sugar over medium heat. Add the noodles, sesame seeds and almonds. (Discard seasoning pack from noodles or save for some other use.) Cook and stir for 6-8 minutes or until browned; set aside.
In a large salad bowl, toss the romaine and onions.
In a jar with a tight fitting lid, combine the dressing ingredients; shake well. Just before serving, drizzle over romaine mixture; top with noodle mixture.Toss to coat.