Pour milk into the blender, then add Greek yogurt. Follow the manufacturer's loading order for an inverted personal blender.
Add banana, 1 tablespoon honey, vanilla, optional lemon and salt. Place frozen strawberries on top without packing them down.
Blend on low for 10 to 15 seconds, then on high for 45 to 60 seconds, until a stable vortex forms and the mixture is completely smooth.
If the blender stalls, stop it and add milk 1 tablespoon at a time. Scrape safely and restart on low.
Add honey for sweetness, lemon for brightness or yogurt for tang. Blend 10 to 15 seconds after any adjustment.
Divide between two chilled glasses and serve immediately for the creamiest texture.