Season the shrimp with olive oil, red chili flakes, salt, and pepper. Marinate for at least 15 minutes.
Heat a grill pan, add the shrimp and cook the shrimp for 4-5 minutes until it turns pink and oblique. Once done, transfer the shrimp to a plate and set it aside.
In a small bowl, prepare the dressing, whisk the olive oil, lemon juice, oregano, salt, and pepper.
Meanwhile, cook the orzo according to the package instructions. Add the cooked orzo and about 3 tablespoons of prepared dressing and transfer it to a serving platter.
Top them with bell pepper, cucumber, red onion, olives, parsley, dill, and cooked shrimp. Pour the remaining dressing over the salad and mix.
Garnish the salad with lemon wedges and serve immediately.