Chicory root and potato

Name: Chicory root and potato
Ingredients: 1 chicory, root only, or 25g of chicory root powder; 100g of whipping cream; 350g of whole milk; 105g of egg yolk; 70g of caster sugar; 1g of gellan gum; 125g of butter; 75g of cream; 100g of caster sugar; 50g of glucose; sea salt; 67g of butter; 35g of dark brown sugar; 20g of caster sugar; 1/2 lemon, zested; 63g of plain flour; 4g of baking powder; 2g of sea salt; 150g of Charlotte potatoes; 150g of whole milk; 25g of butter, cooked into a beurre noisette; 37g of caster sugar; 1/4 gelatine leaf