We always go to my in-laws for Christmas Eve dinner. My MIL is German, so we always have beef rouladen, spaetzle with gravy and roasted veggies. Also tons of wine. Then stöllen and Black Forest cake.
Christmas Day breakfast is at my house, with my parents and siblings. I make baked egg casserole and cinnamon rolls. This year I'm thinking of switching the rolls for baked French toast. We also have fruit, hot chocolate, mimosas, cookies...pretty much whatever is available to munch on.
That afternoon we will go to DH's grandparent's house, where we have honey ham and lots of traditional sides. DH's grandpa makes old fashioned popcorn balls!