2 tablespoons butter or extra-virgin olive oil
1 large onion, thinly sliced
3 garlic cloves, minced
1 large celeriac bulb, peeled and cubed
1 potato, cubed
4-8 cups broth (depending on how thick you want it; start with 4)
1 large bunch, spinach, washed, stemmed, coarsely chopped
Salt and fresh ground pepper, to taste
Yogurt or sour cream, for garnish
10 chives, chopped for garnish
Note: You don’t have to purée the soup if you preferring a chunky-textured soup.