Blueberry Jam in 40 Minutes

Instructions:

1. Rinse the blueberries thoroughly and remove any stems.
2. Place the berries, sugar, lemon juice, and salt into a large heavy-bottomed pot or Dutch oven.
3. Stir over medium heat until the sugar has completely dissolved into the berries.
4. Increase the heat to medium-high and bring the mixture to a rolling boil.
5. Stir constantly to ensure the sugar doesn't burn on the bottom.
6. Continue boiling for 15–20 minutes until the mixture thickens and the bubbles become larger and heavier.
7. Perform the Plate Test: Drop a small spoonful of jam onto a plate that has been chilled in the freezer. Wait 30 seconds, then push the edge with your finger. If the surface wrinkles, it has reached the setting point.
8. Remove from heat immediately and transfer into sterile glass canning jars.