I recently bought some organic garnet sweet potatoes, thinking they would be good because they are in season. I baked them as usual and they ended up and stringy and starchy. Is it the harvest this year or do you think I just got a bad batch? I also accidentally bought and baked one Japanese sweet potato along with the others and it was delicious. But for Thanksgiving I want to go with the traditional orange fleshed variety. Any advice or insight?