There won't be a blanket Muslim meal on this flight for everyone. We did Dalaman last year in CE. Some in our party had the Muslim meal, others didn't and went for the Veg option.
From memory, the veg option was Pumpkin Tortellini with butternut squash in a cheese sauce, which wasn't bad actually. The Muslim meal was basmati rice, with 3 (spinach, daal and potato) curry portions to go with it. I tried both and preferred the tortellini tbh.