Cook the pasta according to the instructions on the package. Drain and cool.
Mix the olive oil, lemon juice, mustard, oregano, salt and pepper in a small container with a lid. Shake to combine (alternatively whisk in a bowl).
In a large bowl, combine the cooled pasta, tomatoes, cucumbers, bell peppers, chickpeas, onion, olives and dill.
Add the dressing to the salad and toss it to coat.
Once it’s mixed up, add the feta and toss lightly.
Serve cold.