Chop broccoli into small florets into bite size pieces, dice onion into fine chunks, half the grapes.
Combine all other ingredients into mixing bowl and whisk until smooth.
Toss together broccoli, onion, grapes, broccoli slaw and combine with dressing until everything is coated evenly.
Top the salad with slivered almonds and toss again.
Cover and leave in fridge until ready to serve or eat right away. If you are not eating it the same day, leave dressing on the side until day of if you would like.