Mini Apple Berry Crumble Pies

Ingredients

• 6 tbsp. Unsalted butter, cold and cut into cubes
• 1/3 cup Walnuts, chopped
• 1/4 cup Light brown sugar
• 1/4 cup Granulated sugar
• 1/2 cup All-purpose flour
• 1/2 cup Rolled oats
• 1/4 tsp. Salt
• 1 tsp. Cinnamon
• 1/3 cup White sugar
• 4 tsp. Flour
• 1 1/2 cups Frozen berries (raspberries, blueberries, and tayberries)
• 1/3 cup Light brown sugar
• 2 Medium firm apples, peeled and cut into 1/4 in. slices
• 1 Pie crust, homemade or store bought