Rio Ramen Salad

1. In a large bowl toss together spinach, coleslaw mix, and onions, then chill.
2. In a small jar, shake together salad dressing, pepper, and ¼ cup of grapefruit juice (refrigerate remaining juice for another use) then chill.
3. Just before serving, add grapefruit sections, noodles and sesame seeds to salad.
4. Pour dressing over top and Toss to evenly coat.
5. Serve immediately.