In medium bowl, whisk together yogurt, maple syrup or honey, grapefruit zest, and vanilla. Spoon yogurt mixture into glass Mason jars and evenly divide grapefruit segments over top. Set aside.
In food processor, pulse dates, cashews, cinnamon, and salt until crumbly and combined, about the texture of granola. Spoon date mixture on top of grapefruit, seal jars, and refrigerate until ready to serve, up to 1 day. If not eating within a day, keep all components separate and assemble just before serving or packing to go.
Recipe Notes
Per serving: 442 calories; 11 g protein; 16 g total fat (5 g sat. fat); 71 g total carbohydrates (53 g sugars, 6 g fiber); 98 mg sodium