Two bananas to a potato (I assume we’re talking something like a russet, not a little red potato?) sounds generous to the potato, if we’re talking volume equivalence.
A potato’s a meal. A banana’s a lightish snack.
I've only ever been able to finish raw banana. I've tried raw potato but it was almost gag worthy.
Per 100g ground beef is 300+mg of potassium
No carbs, no sugars, no fiber induced bloating, could easily get more than 100g into a meal
My understanding is potassium also competes with salt in the body