Every year I plant what I call my "salad bar" that I suppose could be described as mesclun. It's an intermixing of various salad greens all in one bed, so I can pop out quickly and grab my evening salad from one place. Every year it's a slightly different selection, but always includes a variety of lettuces, red mustard, sorrel, arugula, chives and parsley. Over the years I've included other ingredients, it just depends on what I have or manage to fit in: cabbages, nasturtiums, cilantro, etc. I figure with diversity comes a range of nutrients, but I'm not scientific about it.