Combine sugar and water in a saucepan, stirring until all the sugar has been coated with water. Place the pan on high and bring to a boil, wiping down the sides with a wet brush to remove any sugar crystals. When the sugar begins to boil, add the lemon juice without stirring as this will cause lumps. Continue to cook until the sugar reaches 338 degrees Fahrenheit, is a dark golden color, and produces a rich aroma. Remove the pot from the pan and begin adding the cream very slowly and carefully, whisking as you do it. Add the butter piece by piece, whisking to incorporate and returning the cream to the heat if necessary Strain through a fine mesh strainer and mix in toasted pecans to finish. Chill and store for up to 3 weeks, stirring before use. Assembly: Cook the oatmeal in apple cider. Stir in a small spoonful of apples and a tablespoon of the caramel in to the oatmeal Serve and top each bowl with remaining apples, toasted pecans, and caramel topping.