Measure and add to a blender: 2 cups chopped fresh pineapple, 1/2 cup coconut milk, 6 oz Greek vanilla or coconut yogurt, 2 tablespoons coconut, and 1 cup ice.
Secure the blender lid. Start blending on low, then increase to high and blend until smooth, about 30–60 seconds.
If the mixture sticks to the sides, stop the blender, remove the lid, scrape down the sides with a spatula, replace the lid, and blend again until uniform.
Pour the smoothie evenly into two glasses.
Sprinkle toasted coconut on top to garnish, if using, and serve immediately.