Red Cabbage Winter Vegetable Soup
300g red cabbage chopped into 5 mm thick strips, without the tough middle250 g potatoes peeled, cubed1 onion finely chopped1 medium carrot peeled, diced40 g celeriac small piece, peeled, diced½ leek cut lengthwise, finely chopped50 g spinach finely chopped2-3 tablespoons...