-I doubled this salad for a group of 50-60 women. I used 3 heads of Costco regular (not mini) Romaine heads, 1/2 box of baby organic Spinach and 1 container of pre-cut butternut squash. I also used about 1 1/2 containers of pre-seeded pom seeds also purchased at Costco.-For buttermilk dressings, I like to purchase Winder Dairy buttermilk. It is a bit thicker than other brands and whips up nicely in dressings. My second choice is Meadow Gold. Both brands found in Utah.