Cut the onion into thin rings, leave for 10 minutes in boiling water to remove the bitterness, then drain the water, add the onion to the cucumbers and radishes.
Remove the Apple core and cut it into slices.
Cut the pepper into rings, put the Apple and pepper in a salad bowl with the rest of the ingredients.
Chop the green onion, parsley, and lettuce into a salad bowl and add salt.
Season the salad with sour cream and mix. You can serve it to the table!