01 - In a medium mixing bowl, whisk together the almond milk, chia seeds, maple syrup, and vanilla extract until fully incorporated. Allow the mixture to rest for 10 minutes, then whisk vigorously a second time to break up any clumps that may have formed.
02 - Cover the bowl tightly and refrigerate for at least 3 hours, or preferably overnight, until the mixture thickens to a rich, pudding-like consistency.
03 - Combine the hulled and diced strawberries with lemon juice and sugar or maple syrup in a separate bowl. Toss gently to coat evenly and set aside to macerate while you prepare the crumble topping.
04 - Preheat the oven to 350°F. Line a small baking sheet with parchment paper. In a bowl, combine the gluten-free rolled oats, almond flour, melted coconut oil, maple syrup, and salt. Mix until the mixture resembles coarse crumbs. Spread evenly across the prepared baking sheet and bake for 12 to 15 minutes, stirring halfway through, until the crumble turns a deep golden brown. Allow to cool completely on the pan.
05 - Spoon a layer of chia pudding into the bottom of each serving glass or jar. Add a generous spoonful of macerated strawberries over the pudding, then scatter a portion of the cooled oat crumble on top. Repeat the layers as desired, finishing with the crumble as the final layer.
06 - Serve the parfaits immediately at room temperature, or cover and chill in the refrigerator until you are ready to enjoy them.