In a 13x11 medium glass or metal pan, add 2-3 teaspoons of olive oil onto the bottom.
Add sliced potatoes, onion and garlic cloves to the pan. Sprinkle with salt and pepper.
Add all the vegetables, herbs, tomatoes or tomato sauce. Add salt and pepper. Add 1/2 cup water over the top.
Cover with parchment then foil, and bake in a 375 degree oven for 45 minutes.
Remove foil and paper and bake for 15 minutes until vegetables are lightly brown. Test the potatoes for doneness.
Sprinkle with olive oil and serve.