This is a physical test. A chemical test for starch is to add iodine solution (red) and see if it turns blue/black in colour. It is possible to distinguish starch from other carbohydrates using this iodine solution test.For example, if iodine is added to an peeled potato then it will turn black.his is a physical test. A chemical test for starch is to add iodine solution (red) and see if it turns blue/black in colour. It is possible to distinguish starch from other carbohydrates using this iodine solution test.
Moving to French cuisine, one of my favourite ways of using up stale bread is in a simple Gascon soup, Garbure, made with layers of bread and cabbage, flavoured with ham, beans and vegetables. Cookery writer Kate Hill's recipe is gorgeous.
The only thing you need to make home made bread crumbs is a hunk of crusty, day-old or somewhat stale bread. I find that day-old French or Italian bread works really well for making homemade bread crumbs. Just cut the bread into pieces. You want them to be approximately 1/2-inch thick and maybe 2 inches wide, like this.