Canning pie filling is new for me. I like the idea that my pantry will stock beautiful pie filling, ready for pies, of course, but also for turnovers, layer cakes, all kinds of other great uses. I varied the mix of berries. As long as the total weight of the berries remains the same, feel free to play with the amount of raspberries, blueberries, etc you want to use. These look great in their jars.
ClearJel is the product to use for thickening the filling for this canning recipe. The only other thickener you can use is cornstarch. Do not use anything else to ensure safe canning.
This recipe makes 3 one-litre jars.