Yam and Butternut Squash Gratin
Pre-heat oven to 375. In a medium sized saucepan melt the butter. Add the shallots and garlic. Heat over medium heat for about 2-3 minutes. Add the flour and whisk thoroughly - cook for two minutes. Add they thyme. Slowly add the milk - continue to stir - then add the parmesan - it will thicken into a nice creamy sauce.
At the same time boil the potatoes and yams. I cut them into medium size pieces that I could cut into thin slices after they were boiled. You could slice them first and then boil - this way would probably take less time. When they are soft, put them in a bowl and sprinkle them with 1 tbsp of flour. Do the same thing for the butternut squash.
Bake in the oven for 35 minutes and then broil for about 2 minutes. And that's it.