Ingredients
- 1/2 cup (1 stick) unsalted butter
- 2 medium onions, finely chopped
- 2 sprigs thyme
- 2 tablespoons all-purpose flour
- 1 28-ounce can crushed tomatoes
- 1/3 cup thinly sliced scallions
- 3 tablespoons heavy cream
- 1/8 teaspoon (or more) cayenne pepper
- Kosher salt, freshly ground pepper
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