Apple Crisp (Vegan)

I've mentioned a time or two everyone in my family seems to have their own dietary restrictions.  My only restriction is I only want to eat tasty food, so I'm always trying to find a tasty recipe that meets those other needs.  I found this Apple Crisp recipe recently via TasteBetterFromScratch and I just tweaked it a bit to make it dairy free (vegan).  It was super delicious regardless of whether that is something you are looking at.  In the future, I'd probably add more of the topping, but that's b/c I like sweets with my sweets!  I'm going to type out the original recipe below, if you want the dairy-just substitute the margarine for butter, and the almond milk for milk-the same ratio as listed.
Ingredients:  
For Crumb Topping:  1/3 c. (dairy free) margarine (cut into small pieces), 1/2 c. oats, 1/2 c. brown sugar, 1/2 t. baking powder, 1/4 t. cinnamon, dash of salt, 1/2 c. flour
For Apple Filling:
3-4 large apples (I used a mix of different kinds of sweet and sours, peel them and slice them thinly), 3 T. margarine (melted), 2 T flour, 1 T lemon juice, 3 T. almond milk, 1/2 t. vanilla, 1/4 c. brown sugar, 1/2 t. cinnamon, dash of salt.
Ice Cream (dairy free) for topping.
Instructions:
1.  Heat oven to 375.
2.  Combine the crumb topping ingredients with a fork or pastry blender until it looks like small crumbs.  Place in fridge while you make the filling.
3.  Peel and slice the apples.
4.  In a separate bowl mix the melted butter, flour, lemon juice, milk, and vanilla.  Pour this mix over the apples and top to coat.
5.  Place apples into an 8x8 pan.  Top with crumb coating.
6.  Bake 30-35 minutes (it should be golden brown)
7.  Let it cool for 10 minutes and serve up with ice cream.