One of my favorites for breakfast is a whole wheat mini bagel and a veggie sausage patty-with a little mustard. I bring a piece of fruit to eat at work mid-morning. I cook "real food" for dinner-ziti, soups, meatloaf, chili, etc. and bring leftovers for lunch-just a smaller portion. When the weather is warmer I like a cup of greek yogurt with fruit. I've kept 50+ pounds off for seven years-you can do this! Good luck! 
