Add the sliced strawberries, lemon juice, ground cinnamon, honey, and ice cubes into the blender.
Secure the lid and blend on high speed until the mixture is smooth and icy, about 30-40 seconds. You should see a vibrant, thick slush with tiny ice shards.
Stop the blender and check the consistency; if it's too thick, add a splash of cold water or additional lemon juice and blend briefly to loosen.
Pour the slushie into chilled glasses, allowing the icy texture to mound slightly above the rim for a satisfying presentation.
Garnish with a fresh strawberry or a small sprinkle of cinnamon for an attractive finish.
Enjoy immediately with a straw or spoon, experiencing the refreshing, icy burst of flavor with a hint of spice.