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In a blender, blend garlic cloves and oil. Pour into a fry pan and add the onion, peppers and tomatoes. Cook until soft (about 5-7 minutes).
When done, ladle 1 1/2 cups of this sauce back into the blender, adding 1/2 cup nutritional yeast, 1/2 cup water and the arrowroot. Blend and return to sauce. Add salt and pepper and simmer until thickened.
In a blender, blend mashed tofu, 1/2 of the grated 'Veganrella', water, nutritional yeast and braggs. Pour the pasta into an oiled casserole and mix thoroughly with the blended 'cheesy' mixture. Mix in red sauce. Sprinkle with the remaining half of the grated veganrella cheese alternative. Bake in a preheated oven at 180C/350F for 35 minutes.