When the cider just begins to simmer, gradually add the cheese a handful at a time, allowing each addition to melt completely before adding the next Continue adding cheese and stirring until all the cheese is incorporated, about 3 minutes. If mixture starts to bubble, reduce heat to low. The mixture is ready when creamy and easily costs the back of a spoon. Stir in curry powder and pepper. If cheese seems stringy, add some or all of the remaining lemon juice.