This kale salad proves that healthy can be anything but boring. It brings together crisp kale, juicy apple, and tangy grapefruit, then finishes with the unexpected twist of crunchy salted almonds.

Grapefruit juice freezes exceptionally well. Pour it into ice cube trays or a freezer-safe bag, leaving room for expansion—Hillis fills bags roughly two-thirds. Fresh juice keeps up to six months; ...