Strawberry Peach Crumble

1 pound strawberries, halved or quartered depending on size
1 pound yellow peaches, sliced (I used frozen)
2 tablespoons fresh lemon juice
1/4 cup brown sugar
1 1/2 tablespoons flour

2/3 cup flour
2/3 cup old fashioned oats
1/4 cup brown sugar
1 teaspoon cinnamon
1/4 teaspoon salt
1 stick butter, chilled and cut into 1/2" cubes

For the filling: In a medium bowl mix lemon juice and flour until smooth. Add peaches, strawberries and brown sugar. Mix until coated well. Pour into a buttered 8x8 glass baking dish.
For the topping: In the bowl of a food processor, add flour, oats, brown sugar, cinnamon and salt, pulse until mixed, add cubes of butter and pulse until butter is pea sized. Crumble over fruit mixture. Bake at 350 for 45 minutes or until fruit is bubbly and crumble is golden brown.