Nibblous | watercress and lancashire cheese bread

Ingredients

• 2 oz (50 g) watercress, roughly chopped
• 4 oz (110 g) Lancashire cheese, roughly crumbled into 0.5 inch (1 cm) pieces
• 6 oz (175 g) self-raising flour, plus a little extra for the top of the loaf
• 4 spring onions, trimmed and finely chopped, including the green parts
• 1 medium Desiree potato, weighing about 6 oz (175 g)
• 1 large egg
• 2-3 tablespoons milk
• salt