Farmer's Wife Beet Green Soup

Here's a great recipe loved by one of our 4-years-running CSA members.  Thanks Charlene!
  From Mario Batali...

Farmer's Wife Beet Green Soup 1/3 cup extra-virgin olive oil
1 onion, peeled and sliced
2 cloves garlic, sliced
2 medium potatoes*, peeled and chopped                   *Peasant Plot potatoes coming soon!
2 teaspoons fine sea salt
1/2 teaspoon red pepper flakes
2 cups chopped beet greens
2 cups water
1 small bay leaf
4 (1/2-inch thick) slices country bread, grilled
Caciocavallo or pecorino Romano, for grating

In a large soup pot over high heat, heat the olive oil and soften the onion and garlic but do not allow them to brown. Add the potatoes, then the sea salt, pepper flakes, and greens, stirring well. Add the water and bay leaf and simmer 15 minutes, or until potatoes are tender.

Serve in large bowls with bread alongside and cheese grated over the top.