Place chia seeds, non-dairy milk, sea salt, collagen (if using) and vanilla (if using) in a bowl. Combine with a whisk, stirring continuously until chia seeds begin to expand and the texture thickens. Set aside.
In a small saucepan or skillet over medium heat add berries. Cook, stirring often until the berries break down and get saucy. They don't have to be fully broken down if you prefer them to have a little more texture.
Separate the berry mixture into the bottom of a smaller jar, layer chia pudding on top (or do the reverse with chia pudding on the bottom and berries on top) and add any additional optional toppings you'd like. Cover and store in the fridge. You can enjoy cold or heat up for about 30 seconds before eating. Enjoy!