Tart with spring onions | Castello®️

Ingredients

• 100 g cold butter
• 175 g plain flour
• 1½ tbsp water
• 1 egg
• 1 dl milk
• ¾ tsp coarse salt
• 6 spring onions sliced in thin rings
• 100 g grated cheddar and maasdam cheese
• ½ tsp dried oregano
• 1½ l butter butter lettuce torn into large pieces
• ¾ l iceberg lettuce torn into large pieces
• 100 g salt-cured ham thinly sliced
• spring onions