Sharon,
I recommend you spend some time with a registered dietician. Ask your doctor or check with the local or the cancer hospital where you were treated for a recommendation.
And if you haven't discovered soy-based products (soy yogurt, cheese, etc. as well as TVP and tofu) look for them at your supermarket.
You can get enough protein on a vegan diet by combining any beans (navy, red kidney, black, garbanzo, soy etc.) or peanuts or lentils with any whole grain (like whole wheat, oats, barley, corn, rice [brown],) etc. Armed with that knowledge, you can create all kinds of tasty treats just by mixing different beans or spices wiht varying grains! One way I reduce boredom with recipes is to change the spices and herbs I add.
Heat, eat and enjoy!
Sally