I have a friend who can't have dairy (except goat) or gluten. Cooking for her is a challenge, but I've learned a few things:
Coconut milk makes an excellent and yummy substitute for whipped cream. No sugar needed! Open the can the day before and refrigerate it. When you're ready, skim the solidified layer off the top of the liquid and whip it just like cream.
Meringue-based desserts are wonderful. Here ya go:
http://family.go.com/food/recipe-ak-...gue-roulade-t/ Substitute that coconut for the cream. Or, I think Dream whip is dairy free. Cool Whip? Haven't looked.
My MIL taught me this one. It's a favorite, and we change up the fillings.
http://allrecipes.com/recipe/strawberry-schaum-torte/
If you're not on Pinterest yet, think about it. I've seen tons of appropriate recipes, and you can search for them.
Good luck!