Cheddar and Walnut Scones with Onion Jam

Onion Jam

• 16 oz red onions, cut into half moons (¼ in.)
• 12 oz sugar
• 3 ½ oz red wine vinegar
• 1 oz white wine
• 1 oz raisins
• ⅛ tsp ground bay leaves (optional)
• ½ tsp ground cinnamon
• 3 whole cloves
• ¼ tsp salt, to taste

Cheddar and Walnut Scones

• 3 oz cheddar cheese, cut into pieces
• 2 oz walnut pieces
• 1 tsp dried rosemary
• 8 oz all-purpose flour, plus extra to dust
• 2 tsp baking powder
• 1 tsp salt
• ¼ tsp cayenne pepper
• ¼ tsp mustard powder
• 1 large egg
• 3 oz whole milk, plus extra to brush
• 1 oz extra virgin olive oil