Rhubarb, Raspberry, Strawberry, Almond Pie! oh my!

I love rhubarb pie. It is my absolute favorite pie. For my bat mitzvah, I didn't let my mom (a professional cake lady) make me a cake...I had strawberry, rhubarb pie.  This is a recipe that I followed from Centsational Girl blog, but that I also altered to meet my own delicious needs.  Also got inspiration from a shop in Bellingham called Manpies, who made a very similar pie.

Rhubarb, Raspberry, Strawberry, Almond Pie

1 1/2 cups raspberries
3 stalks diced (or sliced) rhubarb
1 cup strawberries, chopped
4 teaspoons cornstarch
2/3 cups sugar
1 1/2 cups flour
1 1/2 cups rolled oats
1/2 cup brown sugar
1 tablespoon cinnamon
1/2 cup butter (1 stick)
1 package of Pure Almond Paste
1 handful of sliced almonds

1) Preheat oven to 350 degrees.  Spray pie dish (or 9 x 13 dish) with cooking spray.  Roll out the almond paste to make a bottom pie crust.  Place the crust in the dish.  Add the chopped fruit.

2)Mix the cornstarch and sugar together, then sprinkle the mixture over the chopped fruit.

3) In a mixer, or by hand, blend the flour, rolled oats. brown sugar, cinnamon, sliced almonds, and butter in tablespoon increments.  Pulse it in the mixer or by hand until blended (this part didn't go quite so well with me, but it was fine).  Use your fingers to crumble topping together.

4) Cover the fruit in the topping.  Bake at 350 for 45-50 minutes until lightly brown on top and when the fruit mixture thickens and bubbles.

    It is soooooo good. It was also the first time my friend Roland has ever had rhubarb (I doubt it will be his last).