Add the frozen banana, almond milk, sacha inchi protein powder, vanilla extract, honey, and sea salt to the blender.
Blend on high for 45 to 60 seconds until smooth, scraping down the sides once so no powder sticks to the walls.
Add the ice cubes and blend again for 20 to 30 seconds, until thick and slushy.
Check the consistency. If it's too thick, add almond milk 1 tablespoon at a time; if it's too thin, add a few more ice cubes and blend again.
Taste and adjust sweetness with a touch more honey if the banana wasn't very ripe.
Pour into two glasses, top with crushed roasted sacha inchi seeds, and serve right away.