I use a premixed medley of baby lettuces and crucifer leaves and then pile on blueberries, strawberries, mandarin oranges, sunflower seeds and sliced almonds. Sometimes I add a chopped hard boiled egg.
My favorite dressing for this type of salad is Renee's Sweet Onion vinaigrette (I should caution you that this dressing is a tiny bit 'vinegary'). Since I eat this salad almost every day in the summer, I have probably used 10 bottles of Sweet Onion Vinaigrette since I first discovered it! I may even be addicted, because I always need to have a spare bottle in the fridge.
I love to mix sweet and savory flavors - you never know what you're going to get next!