I added the onion's and the strawberries to the whole mix. Came out great.
I make a lighter version of this recipe from Duke Diet Fitness Center, then add the cheese. I use: 3 T. Splenda, (in place of sugar) 3 T. water 4 bunches (about 4 c.) spinach, washed, and torn 10 lg. strawberries, washed, and quartered 1/4 c. red onions, thinly sliced 2 T. Splenda, (in place of sugar) 1/4 c. Raspberry vinegar 1/4 c. olive oil, mild 1/4 c. Light mayonnaise, (I use Kraft, in place of mayonnaise) 4 tsp poppy seeds Nu Salt (in place of salt) and pepper I also add small Goat cheese chunks OR Feta cheese crumbles because I love them both. It's yummy, and is a real treat, especially when trying to shed those unwanted pounds.
This was an excellent summer salad. We used fresh picked spinach and strawberries from our local u-pick farm. I had to sub balsamic vinegar for the raspberry vinegar but otherwise followed the directions. Next time I would use just a touch less vinegar though -- the dressing was a bit too acidic for my liking. Having said that, the mayonnaise and nuts were a really nice addition to the normal spinach and strawberry salad.