If a meat eater got stranded on a deserted island..

The island housed no animals whatsoever. It was completely deserted. The only thing around were veggies, fruits, berries, nuts and seeds. No animals in sight whatsoever, no birds in the sky, no fish in the ocean (the pollutants created an ocean deadzone around this island)..

The only choice was to eat a completely plant-based diet to survive. What would he/she do?