INGREDIENTS 2 tablespoons unsalted butter, divided 1-2 slices diced day-old bread 1 tablespoon olive oil 2 large yellow onions, thinly sliced 1 1/2 teaspoons kosher salt, divided 1 tablespoon balsamic vinegar 8 large eggs 1/4 cup whole or 2% milk 1 tablespoon Dijon mustard 1/4 teaspoon freshly ground black pepper 1/2 cup diced Gruyère or Swiss cheese (2 ounces) 1 tablespoon finely chopped fresh chives or scallions DIRECTIONS Arrange a rack in the middle of the oven […]
FRENCH ONION FRITTATA — LIKE BUTTER PLAYED TOAST
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