Preheat over to 350°F. Boil or steam the chopped potatoes until they can be pierced easily. In a medium saucepan, saute the onions, carrots, spinach, celery and tomatoes in the oil. Once carrots are tender, add the mashed lentils, basil, salt, and Braggs. Stir and simmer without a lid until the liquid cooks off.

In a large bowl, mash together the potatoes, soy milk, margarine and salt with a potato masher or fork. Set aside. Pour the vegetable mixture into a lightly oiled 9 X 9 baking dish. Layer the mashed potatoes over the top. Bake for 15 - 20 minutes.