<human>: Can you summarize the given text in a few sentences?

In January of 2012 I weighed in at 410lbs. I am now down to 350lbs thanks to some hard work and dedication. After the holidays of 2012 and winter, I gained about 15lbs, but I worked that back off over spring of 2013. I am now stuck back at 350lbs.

So what I was doing was this. I started with a varation of slim fast. I didn't do two shakes a day but I did one shake a day and two moderate sized meals and a couple snacks. I already eat a well balanced diet of food, I love all kinds of foods, so eating lean meats, veggies, and fruits is no big deal to me. This slim fast method worked for awhile. But now I am at the point where the slim fast shake does nothing for me and does not "trick" my body into thinking its full like it used to. It has acctually become a detriment to my gameplan.

I work 2nd shift, so I workout and eat a lunch before I go into work. I was drinking my slim fast as my work lunch, and then eating a small meal before bed time. The problem is now my body thinks I have to gorge myself on a massive lunch before works because I feel like I am really hungry the entire time at work due to only drinking a slim fast and having a piece of fruit or small bag of chips as a snack. 

I need to drop the slim fast but I also need a quick meal for work because I only get 30 minutes for lunch and I like to walk at least 20 of those 30 minutes around our office campus, I also have two 15 minute breaks that I utilize for walking as well. So I need to figure out a good healthy alternative that is also a quick meal to enjoy. Any suggestions are welcome regarding excersise and food.
<bot>: version: Stuck at a plateau of 350lbs, short term weight loss goal for this year is 320lbs. Please help me get back on track.