Measure out the fresh pineapple chunks and place them into the blender jar.
Squeeze the juice of a fresh lime directly into the blender, then add the lime peel if desired for extra zest.
Add the crushed ice on top of the pineapple and lime in the blender.
Securely attach the lid and blend on high speed until the mixture is smooth, frosty, and thickened, about 30-40 seconds. You should see a vibrant, icy texture forming.
Stop the blender and give the slushie a quick stir with a spoon to ensure even consistency.
Pour the pineapple slushie into chilled glasses, watching the icy, colorful beverage settle inside.
Optional: garnish with a slice of lime or a small pineapple wedge for a festive touch.