You will need:
Mixed berries- I used frozen that were thawed a bit
1 packet of sweetener of choice such as Truvia
Place berries in a bowl, here I used 1/2 cup. Sprinkle on top the sugar and mix. Let this sit for 15 minutes. Stir again and mash the berries. See pictures below.
You can also put slivered almonds after each berry layer. It adds great texture.
How good does this look!? Now go make it!