Place the sliced nectarines and banana in a freezer-safe tupperware with a lid. Freeze overnight or for at least 5 hours.
Place frozen fruit and plant-based milk in a high-power blender. Blend for 3 minutes while using the blender’s tamper to push down the frozen fruit. Do not add more plant milk. During the two minutes of blending, the fruit will start to unfreeze and will start to liquify.
Serve immediately.
Notes
For a thicker/thinner smoothie: Add the plant-based milk, a small splash at a time, to your desired consistency. Using fresh fruit makes it thinner, too.
Easiest blending: Add soft/liquid ingredients closest to the blade, and use the tamper (if it has one) to push frozen ingredients to the blade.
Use sweet, ripe fruit: If it’s ripe enough and in season, any smoothie with peaches and bananas will be so naturally sweet and delicious.