One of the things I am doing to lose weight is to eat a nice big salad for lunch every day, and we have long had a salad as an appetizer before dinner each night too.
Here's what I do: I buy seven (7!) Romaine Hearts three packs from the grocery store every time I go (unless weather is nice, and there is lettuce in my garden...even better!). I can eat a half a romaine heart for lunch, as it fills my bowl! I also purchase a bag of individually frozen boneless/skinless chicken breasts or chicken tenders (NOT breaded!). I buy whichever is on sale, but SAM's club seems to have the best deals on this.
Most of the time, my daily salad is a half a romaine heart, one small, grilled chicken breast (grilled on a cast iron griddle--grill side--in the oven), 2T of shredded cheese, 1 shredded carrot, and whatever other veggies I have on hand, including fresh herbs, onions, and so forth. I top this not with salad dressing (I can't seem to find one I both like and that is low in sodium, fat, sugar, etc.), but with a Tablespoon of extra virgin olive oil (in this case, roasted red pepper flavored, which I found on clearance at the grocers), and a few dashes of balsamic vinegar. I also lightly salt and pepper my salad.