In a medium sized pot, start the polenta by bringing 2 cups water to boil.
Whisk in the cornmeal in a slow, steady stream, whisking quickly to avoid lumps.
Continue whisking 1-2 minutes until it starts to thicken a bit.
Reduce the heat so it bubbles gently.
Cover and cook about 20 more minutes, stirring every 4-5 minutes.
In a large skillet, cook the onion, garlic, carrots and celery over medium heat until the onions are soft.
Add a bit of water to the skillet if it begins to stick.
Add the basil, oregano, eggplant and green pepper and cook several minutes until the vegetables are tender-crisp.
Add the diced tomatoes and the juice from the can to the skillet.
Continue cooking until everything is hot and the polenta is finished.
When the polenta is cooked, stir the nutritional yeast into it.
Season everything with salt and pepper.
Serve the vegetables over the polenta.