Wash all vegetables thoroughly.
Chop the romaine lettuce into bite-sized pieces and place in a large bowl.
Halve the cherry tomatoes and add them to the bowl.
Dice the cucumber and bell pepper, then mix in.
Finely chop the red onion and add for extra flavor.
Chop the fresh parsley and sprinkle it on top.
Crumble feta cheese over the salad if using.
Add sliced olives and sunflower seeds for crunch.
Season with salt and pepper to taste.
Drizzle olive oil and vinegar over the top, then toss to combine.