Add beet, strawberries, banana (optional for sweetness) and apple juice to a blender and blend on high until creamy and smooth, scraping down sides as needed.
Taste and adjust flavor as needed, adding more banana for sweetness, apple juice to thin, or strawberries for a more intense fruit flavor.
Divide between two serving glasses and enjoy. Optional: Garnish with banana slices, fresh mint, and/or shredded coconut. Best when fresh, though leftovers will keep covered in the refrigerator for up to 2 days. Freeze leftovers in ice cube trays or popsicle molds for an afternoon pick-me-up.
*For added protein, add your favorite plain or vanilla protein powder! See my full Vegan Vanilla Protein Powder review here. *Nutrition information is a rough estimate calculated with banana and without optional garnishes.