This is a nice video by Dr Lori Hogg.
Dr Hogg talks about (and there is also a nice picture & chart) what you would find on the plate if your implementing a plant-based diet. Things like leafy green colored vegetables, avocados, nuts and seeds, whole grains and starchy vegetables, beans and legumes and fruits. And I forgot to mention water.
Lori also talks about some of the benefits of implementing a plant-based diet.