Hi, I want to make a jam and all the recipes i find online call for the ingredient called pectin. i have no access to pectin here - i'm from asia, so my question is, can i substitute this ingredient with something else like cornstarch or gelatin perhaps? and if i can, how would i work out the proportions...? I want to make a jam that's not based on a fruit, like mint jam or coffee jam, so the binding ingredient is really necessary... Please help.