Frozen bananas, frozen pineapple, chilled coconut milk, lots of fresh lemon juice, maple syrup, vanilla, and a dash of turmeric (for color) are churned to cool and creamy perfection in a food processor. the bananas add a frosty quality while the coconut milk lends richness and a whipped, airy quality. but don't worry about it tasting like bananas, the fresh lemon juice weaves itself throughout and offers a bright, citrusy tang. frozen pineapple teams up with the lemon juice to cut through the creaminess, lending both a pale yellow hue and a light, refreshing acidity. this cool lemony treat is the perfect antidote to the steamy summer heat.