Whisk together the olive oil, balsamic vinegar, salt and pepper.
Chop all the veggies and layer them.
Before serving, add dressing and mix well.
Adjust the veggies proportion according to your preference. Green lettuce can be replaced with ice berg lettuce. Add the dressing just before serving. Cherry tomatoes or heir loom tomatoes can be used too. To mimic the olive garden style salad, you can add the golden pepperoncinis instead of pickled cucumbers. If you are serving for kids, instead of balsamic you can use mayo or ranch.