I have been making this spinach salad topped with warm potato, green beans and feta with a yogurt-mustard dressing lately:
NYT Recipes for Health: Spinach salad
If I have leftover grilled chicken I swap that out for the feta, or exchange the veggies with grilled beets, sweet potato oven chips, asparagus. We're just starting to get the spring asparagus here in the stores.
Also: Salad of shredded cabbage, carrots, cucumber and cilantro. I found out the secret is to shred the cabbage VERY fine. I use my mandoline for that but you can do it with a knife if you have patience. Cabbage is always really cheap and lasts forever in the crisper, even if you cut a head into quarters and use only part at a time it will stay fine wrapped in plastic wrap.
I always have a plastic container of this mixed up in the fridge and dip out some with minor added variations all week. Usually with a viniagrette of rice wine vinegar, olive oil, and a little sugar. Sometimes I add a little soy sauce and sesame oil. Or with chopped apple, mandarin orange slices and/or nuts. You can stuff it in your sandwich too.