Chop the peanuts finely. Heat a dry skillet and toast the peanuts until golden brown. Shake the skillet occasionally to prevent burning. Set aside.
Prepare the dates. Remove the pits, chop them into smaller pieces, and place them in a small bowl. Cover with boiling water, ensuring the dates are fully submerged. Let them soak for a few minutes.
Wash the banana, peel it, and mash it with a fork.
In a bowl, combine the yogurt, mashed banana, and a few drops of vanilla extract. Mix well.
Blend the soaked dates along with the water until smooth.
Pour the date sauce over the banana-yogurt mixture and sprinkle with toasted peanuts.