Choosing the right pumpkin variety to roast has an impact on the end product. The best pumpkins for roasting are the buttercup varieties, orange and green-skinned squash, or small sugar pumpkins. These pumpkins have dense dry flesh which is perfect for roasting. When roasted the end product will be flavorful, with flaky dry flesh, a dry roasted pumpkin is a good thing. The best way to cook pumpkin ribs is to roast them. This brings out the true flavor and sweetness of the pumpkin.