Your pies look good, and the colors are fine. Yes, you can cube the pumpkin, and put it in a big pyrex dish with a little water, then microwave it until it's tender, but not mushy. Then you can EITHER put it in the food processor, and measure the amount needed per pie, and put it in freezer bags, then freeze it. OR you can just put enough chunks needed per pie, in freezer bags, and freeze them. When you go ahead and put it in the food processor, then bag it, you have the advantage of it being ready to use. Putting it in the food processor also cuts all the strings, so it's tender, in case you get one that's a bit on the stringy side.