I think vegetarians are more healthy people than non-vegetarians. I love to eat salad and bean centered dishes and I think these are quite healthier as well. Tell me are you a vegetarian or non-vegetarian? What are your favorite dishes?
The most important rule of healthy eating is not to eat fried foods. You can eat absolutely everything; the main thing is that food should be cooked healthily.
Everything might be natural. Probably, oatmeal or other cereals, as well as boiled or grilled chicken or fish. But you should know the limit for every kind of food.