Split ramen noodles in half (save the seasoning and half of the noodles for another use). Break apart remaining noodles; place in a bowl. Add the cabbage, romaine, onion, almonds and sesame seeds.
For dressing, in a jar with a tight-fitting lid, combine the vinegar, sugar, canola oil, water, sesame oil, soy sauce, salt and pepper; shake well. Add dressing to salad and toss to coat. Serve immediately.