Preheat oven to 375°F. Let the frozen berries thaw in a strainer for about 10 minutes.
Add the slightly thawed berries (or fresh berries) and cornstarch to an 8-inch baking dish. Mix until the berries are evenly coated with cornstarch.
In a large bowl, add all of the crisp ingredients: oats, chopped walnuts, sliced almonds, almond flour, maple syrup, melted vegan butter, vanilla extract and salt. Mix with a spoon until well combined.
Pour the crisp mixture on top the berries and spread until evenly coated.
Bake for 30 minutes.
Serve topped with a scoop of vegan ice cream, if desired. Enjoy!
