Preheat the oven to 350°F. Line a muffin pan with paper liners (recommended). If you don't have liners, a good greasing of your muffin tin should be fine.
In a large bowl, combine the plant milk and lemon juice. Let sit for 10 minutes while you gather the other ingredients.
After 10 minutes is up, add the flour, cornmeal, sugar, baking powder, and salt to the bowl.
Add in the applesauce, oil, vanilla and lemon extracts.
Give it a good whisk until blended - there may be a few small lumps.
Last, fold in the blueberries using a spoon or a spatula.
Spoon the batter evenly into the prepared muffin pan, filling each cup almost full.
Bake for 30 minutes, until a toothpick inserted into one of the muffins comes out mostly clean (perhaps just a few crumbs).
Let cool completely before eating. Enjoy!