01 - Combine frozen strawberries, frozen banana, pineapple juice, coconut milk, maple syrup, and lemon juice (if using) in a high-powered blender or food processor. Blend on high, scraping down sides as needed, until completely smooth and creamy.
02 - Taste the mixture and add more syrup if desired to reach preferred sweetness level.
03 - Serve immediately for soft-serve texture, or transfer to freezer-safe container and freeze for 30-60 minutes for firmer consistency. Scoop into bowls or cones to serve.