Vegetable soup with fresh turmeric

Ingredients

Serves 4

1 Tbsp canola oil
½ leek, washed and thinly sliced
1 onion, peeled and thinly sliced
2 carrots, peeled and sliced
500g peeled and diced butternut or pumpkin
3 cloves garlic, very finely chopped
½ Tbsp finely chopped fresh turmeric (peeled)
¼ small cauliflower, sliced into bite-sized pieces
1.5 L vegetable stock
pinch salt
freshly ground black pepper, to taste
½ cup sliced spinach or silverbeet leaves
½ Tbsp lemon juice
¼ cup chopped parsley leaves