In a large nonstick sauté pan, stir together blueberries, sugar, cornstarch, cinnamon, vanilla extract and salt.
Simmer for about 20 minutes or until the blueberries start to burst.
Allow to cool and store or use right away.
Notes
Storage - Store in a sealed container or jar, in the fridge, for up to 1 week. Store in an airtight container, in the freezer, for up to 2 months.
Reheating - Reheat using the microwave. You can also allow it to sit out on the counter until thawed enough to add to a pie or dessert and allow the baking process to finish heating it up.
Swap for other berries - This base recipe works great for most berries if you like the spicy and autumn style of pie filling. It brings out a delicious flavor in most berries.
Pro Tips from Liz
Use a non-stick sauté pan. If you don't do this, the hot sugar syrup from the fruit juices will stick to your pan.
Monitor the burner heat to prevent the filling from burning. The mixture needs to simmer over low to medium-low heat. Do not let it come to a rolling boil!