Begin by making your filling, this has a jam consistency. In a medium saucepan, combine strawberries, lemon juice, maple syrup and lemon zest. Heat to a medium to medium high heat, until mixture begins to bubble. Let bubble for 1-2 minutes, then lower heat to a simmer. While simmering, be sure to mash the berries with a wooden spoon. Cook for an additional 2-3 minutes, remove from heat. Add in chia seeds. Let cool for 5-10 minutes before transferring to a glass jar or dish, and place in the fridge to cool completely. This will take about 1 hour, but you can also make the filling and let sit overnight.
Preheat your oven to 350 degrees. To make your crust, combine all crust ingredients into a food processor. Pulse until a dough like texture forms. Press the crust into an 8x8 pan, evenly distributing. Place in the oven and bake for 15 mins. Set aside and cool. Leave oven on.
While crust is cooling, make the crumb mixture. Combine all ingredients into your food processor and pulse for about 10 seconds, or until mixture is crumbly.
Once crust is cooled, spread the jam filling over the crust. Complete by topping with the crumb mixture. Now bake for 20-22 minutes, or until top is golden brown.
Remove from oven and cool completely. Once cooled, cut into squares.