In a mixing bowl, combine the chia seeds, almond milk, maple syrup, and vanilla extract. Stir properly to ensure that the chia seeds are evenly distributed.
Cover the bowl with plastic wrap or a lid and refrigerate for at least 2 hours or preferably overnight. This allows the chia seeds to absorb the liquid and create a creamy pudding-like texture.
Before serving, give the chia seed mixture a good stir to break up any clusters and achieve a smooth consistency.
Wash and prepare the mixed berries by slicing or dicing them, depending on their size.
To assemble, divide the chia seed pudding into individual serving bowls. Top each portion with a generous amount of mixed berries and a sprinkle of chopped nuts for added crunch and nutrition.
You can also drizzle a little extra maple syrup or honey on top if you prefer a sweeter taste.