Based on a recipe I discovered in The Moosewood Restaurant Kitchen Garden by David Hirsch. Refreshing as the tomato-based version, this one takes advantage of produce available earlier in the season. Other greens, such as arugula, and herbs can be included. The original recipe calls for fresh dill, but I did not have any in the garden. If you don't have nasturtiums, add a couple of fresh, red radishes instead.