Place the almonds on a baking sheet and roast them in the oven for 10 minutes at 150ºC (302ºF). Let them cool down and then finely grind them in the food processor.
Melt the butter and set it aside to cool down a bit. Beat the eggs with salt and stevia and now add the butter, followed by sour cream. Keep beating at a high speed. At this point add lemon juice. When the mixture creates a shiny emulsion you can start adding the dry ingredients.
Mix the ground almonds, sunflower seed flour, coconut flour and psyllium powder in a bowl and start adding this mixture spoon by spoon to the wet ingredient mixture. Add 6 tbsp of sparkling mineral water.
Divide the mixture in two and add dark cacao to one to create a dark batter. Mix well so that cacao unifies with the mixture.
Grease a 30x20 baking pan with butter or coconut oil and sprinkle with some coconut flour. Pour in the light batter and then add dark batter randomly in different spots. Using a long wooden stick (skewer) start creating circular movements so that the dark and light batters mix and create nebulae effects.
Bake it in the oven for 20 minutes at 180ºC (356ºF). While the brownies are being baked, prepare the syrup.
In a medium saucepan add a full cup of well infused Earl Grey tea, stripes of the citrus peel of your choice, natural rum flavouring and stevia blend sweetener. let it boil and set it aside.
When the brownies are baked, remove them from the oven and cut in 28 pieces. Pour in the syrup gently so that each browny gets soaked.
Let them cool down totally and serve with a cup of Earl Grey - Hot (Picard) or a cup of Coffee, black as Captain Janeway would!