Classic grilled cheese with marinated onions and wholegrain mustard

Country White Sourdough Oval bread - 8 slices

Extra virgin olive oil - 1/3 cup

Tablespoons white wine vinegar - 2-3

Tablespoons Maldon sea salt - 2

Tablespoon freshly cracked black pepper - 1

Medium yellow onions, sliced 1/8-inch thick - 2

Wholegrain mustard - 1/4 cup

Swiss cheese, sliced 1/16-inch thick - 8oz

To prepare the marinated onions

Combine the oil, vinegar, salt and pepper in a bowl. Add the onions, toss to coat them, and marinate for 15-20 minutes at room temperature. Season with more vinegar, salt, and pepper

To assemble the sandwiches

Set half of the slices of bread buttered side down.

Spread an even layer of mustard over the bread and cover with half the cheese slices, folding them back in toward the middle if they extend past the edges of the bread.

Scatter the marinated onions on top and place the remaining cheese slices over the onions.

Put the top slices of bread over the cheese, buttered side up.

Grill the sandwiches using a panini press. Cut each sandwich in half diagonally.

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