Place the nuts and seeds in a food processor. Add rosemary and salt. Pulse it for several seconds and repeat until you ground them finely. Mix this mixture with almond flour, coconut flour and psyllium powder.
In another bowl, Beat the eggs with an electric mixer and start adding melted butter. Add sour cream. At this point add minced garlic or garlic powder and keep beating.
While you are beating the wet ingredients mixture, start adding the dry ingredients spoon by spoon.
When you've added all the dry ingredients the batter will get quite thick. At this point, start slowly pouring sparkling mineral water. Keep beating at a lower speed.
Line a 13x9" (33x23 cm) baking pan with parchment paper and grease it with some butter or olive oil. Pour in the batter and sprinkle with sesame seeds. and
Bake the Pogača for 15 minutes at 200ºC (392ºF). Then reduce the heat to 150ºC (302ºF) and bake for another 15 minutes.
Serve warm or cold, and combine with smoked bacon, prosciutto, aged goat or sheep cheese, olives and other Mediterranean Keto-friendly foods...