Greek Style Fish / Ryba po Grecku (Traditional Polish Dish) Recipe

[recipe inspired by my friend Lidka, who often prepare this dish] INGREDIENTS for the veggies 2 large leeks – 400g (sliced) 4 medium onions – 500g (chopped) unsalted butter or olive oil to fry onions about 10 carrots (1kg) 2 parsnips (500g) ¼ celeriac root (200g) – optional 300g tin of tomato puree 1½ cup hot water to dissolve cubes 3-4 fish or vegetable cubes (10g each) handful fresh parsley leaves or 1 tbs dried ½ lemon juice ½ tbs garlic powder of few garlic cloves (cho (...)