"These French onion soup puffs are the perfect canape. Filled with soft, caramelized onions and nutty Gruyere, they are a guaranteed crowd pleaser...."
INGREDIENTS
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6 red onions (thinly sliced)
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1 tablespoon soft brown sugar
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1 tsp thyme leaves
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salt to taste
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400 g (14oz) Puff pastry (thawed)
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100 g (3.5oz) Gruyère (grated.)
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1 egg (beaten)