Check out whfoods.com for a pretty solid outline of the healthiest "real foods" out there. What I would do if I were you is look at ways to incorporate more lean proteins into my day. Beans, nuts, fish, eggs, yogurt. It's really hard for me to stay on a plan if I'm not tracking each morsel, but MAN when I list it out like that -- just sounds delicious!
If you can stomach breakfast -- I'd scramble a couple eggs, diced veggies and low calorie cheese. I sometimes even eat black beans with my eggs in the morning to get even more protein and fiber.
Maybe at lunch toss the bread and add in some cheese slices to make turkey roll ups. That way you still get the fun of the mustard, and even the mayo, if you want it. And it's EASY.
From looking at your plan, it looks like you might not even be hitting 1000 calories a day, and you probably need between 500 and 1000 more. That's GOOD news! Every body is different, but it is extremely common to see the scale drop and then hit a rough spot. I generally take it as a sign that I need to shake up my routine, so you're in the right place!