3 Tablespoons of butter
1 tablespoon olive oil
1/2 cup onion, finely chopped
3 garlic cloves, minced
3 carrots, peeled, diced
6 cups vegetable or chicken broth
2 large white potatoes, peeled and diced
4 cups spinach
2 tablespoons chopped dill
1/4 cup heavy cream, plus more for drizzling
Salt and pepper, to taste