For the broth:
- chicken bones or a chicken carcass left over from a roast chicken
- 1 liter water 4 cups
- 1 onion
- 1 stalk celery
- 1 bouillon cube
For a vegetarian version use vegetable broth
For the chive oil:
- 2 bunch chives approximately 1.4oz, 40g
- 1 teaspoon salt
- ½ cup flavorless vegetable oil such as canola 3.5oz, 99g
To finish the base:
- 3 tablespoons butter 1.5oz, 43g
- 1 leek approximately 8oz, 227g
- 1 tablespoon all-purpose flour .3oz, 8.5g
- 1 bunch asparagus approximately 1lb, 454g
- 4 tablespoons crème fraiche or sour cream 1.9oz, 55g
- salt as needed