Perhaps they were freshly frozen, as in, frozen within the last week?
I was deeply saddened the other day when I went to Trader Joes. I found a bag of frozen sweet potato fries, but was sorely disappointed to find they contained soybean oil. Instead, I purchased a bag of sweet potatoes, cut one into fries, and threw them in the oven. Sweet potato fries taste great without the added nasty.
Stumbled into Primal due to food allergies, and subsequent elimination of non-primal foods.
Start Gluten-Free/Soy-Free: December 2012; start weight 158lbs, Ladies size 6
Start Primal: March 2013, start weight 150lbs, Ladies size 6
Current: 132lbs, Ladies size 2
26lbs lost since cutting the crap.