Stir the lentil mixture in a large bowl with the remaining ingredients. Place in a lightly greased loaf pan. Brush top of loaf with remaining soy sauce. Bake for about 45 - 50 minutes or until crisp on the outside. Let stand for 10 minutes before slicing and serving.
Leftovers make great sandwiches.
Heat oil in large skillet. Cook onions, garlic and mushrooms until soft, about six minutes. Stir in tomatoes and oregano and simmer 10 minutes. Taste for salt and pepper and set aside. Soften matzohs by holding under warm running water for a few seconds.