Hmmmmmm, dairy products can be bad for fats and 'bad' meats such as bacon and sausages will be out. Buy the leanest meat you can afford and trim and drain it well. Herbs and spices can be fab for making things tasty, invest in a good selection. Have you got enzyme top-ups from your doc as well? Cook from fresh as much as you can, simple stuff can be best, like the pasta you've had or rice or noodles with chopped veg and a little bit of meat - which can also be done cold to take to work. Or jacket potatoes are easy enough As for sorting a sweet tooth, I find dark choc works well as you don't need much to fill you up. Which reminds me, watch your sugar intake as well (presume they told you this) as your pancreas also produces insulin, which regulates blood sugar.
Hope this gives you some ideas (and wish I could practice what I preach!)
Hope this gives you some ideas (and wish I could practice what I preach!)