Папки: Закуски
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Caramelized onions and melty gruyere cheese make an amazing grilled cheese sandwich with all of the flavors of everyone's favorite soup.2 large onions, yellow, sweet, or red, choose whatever you like
5 tablespoons butter, divided
1 tablespoon canola oil
1 teaspoon kosher salt
2 sprigs fresh thyme sprigs
3 tablespoons water or wine, white or red, whatever is on hand
1 teaspoon bouillon soup base (optional)
8 slices sourdough bread
4 ounces gruyere cheese, grated, about 1 cup