Blend dates with water in a high-powered blender until smooth, about 30 seconds. Place frozen strawberries and 1/2 cup of the blended dates in a medium pot, bring to a simmer and cook for 5 minutes, stirring frequently and mashing with the back of a spoon or a potato masher to break up large pieces. Add chia seeds and continue to cook and stir for 15 minutes. Remove from heat and stir in vanilla. Set aside.Preheat oven to 350 degrees F. Lightly oil a baking pan (see note). Combine mashed bananas and oats. Add the remaining blended dates, almonds, coconut and cinnamon. Mix well. Pour 2/3 of the mixture into prepared pan. Bake for 10 minutes.Remove from oven and spread the strawberry filling over the baked layer. Crumble the remaining oat mixture on top.Return to oven and bake for an additional 20 minutes or until top crumble is slightly golden. Allow to cool before cutting into squares.