This is just an update on the cooking times for the Flan Imposible (ChocoFlan).
I made 6 of these yesterday at work for a function we're having today. We've got Montague double convection ovens at work and these things really rock, they are some of the best commercial ovens on the market. They also oeprate at a pretty high BTU rating.
The first 2 flanes went in the oven at 350* with the convection feature on. They cooked in about 40 - 45 mintues, which is less than the time in the recipe.
The next 2 went in the other oven at 350* with the convection feature off. These took 50 mintues, which was the time in the recipe.
The last 2 went back into the first oven with the convection feature off. Unfortunately, my employees were at the end of their shift and kept turning the oven off without looking inside as they thought all the baking was done for the day

Once we got the oven turned back on these took about 45 mintues +/-.
My guess is that this recipe was probably originally developed using a commercial oven, whether in a test or restaurant kitchen. On the positive side, this recipe is pretty sturdy/flexible and can stand up to the variables of home kitchen ovens. The recipe works regardless of the oven used, tho' cooking times may vary considerably
I've now made this recipe about 15 times, for home use my recommendation is to use an oven thermometer to verify the temperature and then monitor the cake for doneness beginning at about the 45 - 50 mintue mark and adjust the cooking time to your oven. If your oven has the ability to do convection cooking, use it. This does speed the cooking time and it does not affect the appearance or quality fo the finished product.
DanM...think about actually mixing your puree of butternut squash and chipotles into the masa para tamales and then just filling with your leftover turkey