Set a 20 cm / 8-inch skillet over medium heat with no oil. Add the almonds in a single layer.
Toast the almonds for 3 to 4 minutes, stirring every 20 to 30 seconds, until golden brown and fragrant. Pull them off the heat right away, they burn fast once they start to color.
Let the almonds cool for 2 minutes, then roughly chop if using whole ones.
Divide the skyr between two bowls, about 300 g each.
Stir the vanilla extract into each bowl if using.
Top each bowl with blueberries and the toasted almonds.
Drizzle 1 tablespoon of honey over each bowl.
Finish with a pinch of cinnamon and flaky salt if using. Serve right away while the almonds are still crunchy.