French Onion Grilled Cheese

The ultimate comfort sandwich upgrade: slow-caramelized sweet onions and melted Gruyère sandwiched between golden buttery sourdough.

60 min total Base: 2 servings 620 cal total

Submitted by Mystery Chef AI

Ingredients

Adjust Servings2 servings

1Base: 2 servings16

Sourdough bread

4 slices

Yellow onions, thinly sliced

3 large

Gruyère cheese, grated

150 g

Butter

4 tbsp

Fresh thyme

2 sprigs

Dry white wine or sherry

50 ml

Dijon mustard

1 tbsp

Cook sliced onions in 2 tbsp butter over low heat, stirring often, for 35-40 minutes until deep golden.

Add wine and thyme, cook until liquid absorbs. Season well.

Spread mustard on two bread slices. Top with caramelized onions and generously pile on Gruyère.

Butter the outside of each sandwich.

Cook in a skillet over medium-low heat, pressing down, for 4-5 minutes each side until golden and cheese melts.

Serve immediately while hot and gooey.

💡 Chef's Tip

Low and slow is the key for caramelized onions — don't rush it or they'll burn instead of sweeten.

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