Mushroom Tart with Dried Onion Recipe

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This delicious recipe can come in handy in the mushroom season. The presence of whole-grain flour in the dough enriches it with useful fiber. A pan-dried onion with 1 tablespoon of oil reduces the formation of trans fats. A dish with a high protein content due to the presence of eggs is provided to you. This dish is suitable for ovo-vegetarians.