Cut the tofu into pieces and grate it. Mince the onion.
Sauté everything a few minutes in some olive oil. Then add the balsamic vinegar and the soy sauce, and leave for 5 minutes at medium heat.
In a dish, greased with olive oil, pour the grated tofu an smooth the top.
Peel and dice the potatoes. Wash the zucchinis, cut them in half in the lenght and take the seeds out. Cut them and mince the onions. Put everything in a pan with olive oil, and cook for 20 minutes at medium heat, stirring regularly.
Mash into purée with a hand mixer. Add some salt, pepper and nutmeg.
Pour the purée on the tofu, and smooth the top.
Bake 20 minutes at 350°F.(180°C).
There you are, your vegan zucchini and tofu pie is ready!
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