Sweet caramelised onion and feta tartlets recipe

INGREDIENTS

• 80 butter
• g large brown onions, thinly sliced
• 2 sugar
• 1 pinch of salt
• tbsp white wine
• 1 sprigs thyme, leaves picked
• 2 feta cheese
• tbsp plain (all-purpose) flour
• 3 chilled butter, cut into cubes
• 200 pinch of salt
• g chilled water