I have substituted walnuts instead of the avocados in this recipe and it forms a nice tart. Then you can make a filling out over strawberries, mango etc. Blend some of the fruit with Agave Nectar etc (salt as required) leaving some to act as the topping. If wanted there are some whipped cream (coconut) recipes if you want to add a dollop. The nut adds the oil component as well as texture and umami taste.