Roast nuts, seeds and buckwheat groats in a dry hot pan for a few minutes stirring frequently so that they don't burn. Remove to a plate to chill for a while.
Blend roasted nuts, seeds and buckwheat groats with all other crust ingredients until you have a firm batter which is easy to shape.
Press batter into the bottom of a spring form pan lined with parchment paper.
Blend all filling ingredients and pour on top of the crust. Let chill in the fridge for about 5 hours or in the freezer for about 1 hour (depending on how soft / creamy you like the tart filling).
Decorate cake with fresh strawberries. Enjoy!
