2 tablespoons unsalted butter |
1/4 cup finely chopped onion |
1/2 teaspoon curry powder |
2 cups finely chopped carrots |
3 cups chicken broth |
salt and pepper |
1 teaspoon grated orange rind |
1/4 cup orange juice |
sour cream and finely sliced scallion or chives, for garnish |