Make the croutons: Preheat the oven to 375 degrees F. Cut bread, crust included in cubes of max. 1-inch or tear the bread in bite-size pieces.
In a small bowl, mix olive oil, salt, pepper and garlic powder. Add bread pieces to bowl and mix until the bread is evenly coated with the oil mixture.
Spread the bread out on a baking sheet covered with parchment paper. Sprinkle 1 tablespoon of Parmesan cheese evenly over the bread and transfer baking sheet in the oven. Bake for approx. 5 minutes. Stir them and sprinkle with the remaining Parmesan cheese and bake another 5 minutes or until they reach your desired crispiness. Allow to cool.
Make the dressing: Mix the ingredients: sherry vinegar, olive, oil, garlic powder and salt and pepper to taste.
Make the salad: Cut the cucumber, tomato, and feta in roughly equally sized pieces, about the same size as the croutons. Chop the basil leaves. Leave some feta and basil for the very last moment. Add the dressing and mix again to coat vegetables and cheese.
When you are ready to serve. Mix most of the croutons with the salad.
Divide over 2 plates. Toss feta and croutons you kept aside and sprinkle with basil.
Notes
Type of bread: rustic or baguette or sourdough
You can add your favorite herbs and/or seasoning to the mix to add more flavor to the croutons.