A recipe for extremely tasty vegetarian burgers and a way to make your own ketchup. Ideal for summer days and very easy and fast to prepare. So tasty it will please everybody, particularly childrens. The artisan ketchup will surprise you. The ketchup can be put in a jar and kept in the fridge for long time by topping it with a thin layer of olive oil. Ingredients for the burgers : 2 medium potatoes (about 300 grams) 1 box of drained boiled chickpeas 2 egg yolks sage pep