4 tablespoons butter
Directions:
- 1In a large pot, melt the butter over med-high heat.
- 2Add the onion and cook, stirring, until very tender, 7-10 minutes.
- 3Stir in the garlic, Cajun seasoning, and cayenne pepper and cook, stirring, for 1 minute.
- 4Stir in the diced tomatoes and broth.
- 5Simmer, uncovered, for 15 minutes.
- 6Working in batches, transfer the soup to a blender or food processor and puree until smooth.
- 7Return the soup to the pot.
- 8Stir in the sour cream and salt and simmer until heated through, about 3 minutes.
- 9Serve piping hot.