While the dressing comes together, prepare all your vegetables for maximum efficiency. Chop the romaine lettuce into 1-inch bite-sized pieces and place in a large salad bowl. Halve the cherry tomatoes, slice the cucumbers into 1/4-inch thick half-moons, thinly slice the red onion into 1-inch long slivers, and slice the pepperoncini. Keep all prepared vegetables separate or loosely combined in the bowl—we'll add the more delicate items last to prevent wilting.
In a separate medium bowl, whisk together the Greek yogurt and mayonnaise until smooth and well combined. Add the red wine vinegar, fresh lemon juice, and extra virgin olive oil, whisking continuously to emulsify the dressing and create a cohesive, creamy texture. In a small bowl, combine all the dried herbs and spices (parsley, dill, basil, garlic powder, onion powder, oregano, paprika, sea salt, and black pepper), then whisk this mixture into the wet ingredients along with the honey and grated Parmesan cheese. Taste and adjust seasoning as needed—I like to add a touch more vinegar if the dressing feels too heavy, as it brightens the final dish considerably.
To the bowl with the lettuce and prepared vegetables, add the kalamata olives and crumbled feta cheese. Pour the dressing from Step 2 over the salad and toss everything together gently but thoroughly, ensuring every piece of lettuce is coated with the creamy herb dressing. I find that using salad tongs or two large spoons makes this much easier than a fork, and it helps prevent bruising the more delicate vegetables.
Just before serving, top the dressed salad with the croutons and a final sprinkle of freshly ground black pepper. Add the croutons at the very end so they stay crispy and don't absorb too much moisture from the dressing. Serve immediately while the croutons are still crunchy and everything is at its best.