In a large bowl, combine the chopped romaine lettuce, halved cherry tomatoes, sliced cucumber, grated carrot, and thinly sliced red onion. Toss gently until mixed.

In a small bowl, whisk together olive oil, red wine vinegar, Dijon mustard, Italian seasoning, garlic powder, salt, and pepper until smooth.

Drizzle the vinaigrette over the salad mixture and gently toss to coat.

Serve immediately with grated cheddar cheese on top if desired.