Steps: |
| -Heat a heavy bottom 1-gallon stockpot to medium-high and add the oil. |
| -Saute the onion and garlic until translucent. |
| -Add the halved asparagus stalks and the potato. Then add the stock, garni and lemon zest. |
| -Simmer the soup for 30 minutes over low heat. |
| -While the soup is simmering, blanch the asparagus tips in the soup or a separate pot of water. Reserve the tips for a garnish. |
| -When the potatoes are soft, puree the soup with an immersion blender or in small batches in a blender. |
| -Add the red chile flakes and spinach while you are pureeing the soup. |
| -Add the butter, season to taste and remove from the heat. Serve immediately. Additional heating will turn the soup brown. |
Garnish with creme fraiche, seared mushrooms, salsa or crab. |
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