What Happens When You Cook Pasta Too Long? http://www.livestrong.com/article/447982-what-happens-when-you-cook-pasta-too-long/How does food preparation affect the glycemic index of a pasta dish?http://www.dreamfieldsfoods.com/pro-faqs.html#sec7_q008How a food is prepared also has influence. A common example is pasta. Well cooked pasta (Aldente`) which is firm when you chew has a lower G.I than overcooked pasta that is soft when you chew it. Evidently overcooking pasta breaks most of its structure that expose its starch for easy and quick digestion.http://www.health-emark.com/glycemic-index.html