(Prep: 15 minutes)
In a small bowl, stir together the yogurt, maple syrup, and vanilla extract until smooth and well combined.
Prepare your layers. In four parfait glasses or jars, begin by spooning a layer of the yogurt mixture into the bottom of each glass.
Add a sprinkle of the chopped walnuts, wheat germ, and cracked flaxseed over the yogurt.
Arrange a layer of the grapefruit segments, minneola segments, and fresh blueberries on top of the crunchy mix.
Repeat the layering process—yogurt, crunch, fruit—until all are used, finishing with a final layer of fruit and a sprinkle of the walnut mix on top.