I just now got back to the bb, and found your post. No, I've never heard of "The Challenge".
The package for making pie with tofu is called MoriNu Mate. I too make a cauliflower recipe that is delicious. You cook the cauliflower head in the micro. Mix tofu (I like the garlic/herb), 1/2 c. soy mayo, and a tbs. prepared mustard. Spread that mixture over the cooked cauliflower, and return to micro for a minute or till it's hot.
Evelyn in WA. There was just a wee bit of snow yesterday morning, but it was a beautiful, sunny day. Today is overcast.