That's a fair range of different food lol for a level pricing field.
Decent steaks are €15 - €30 broadly. Jugs of sangria with meals approx €10.
But pasta dishes can be as little as €5.
There's still a fair selection of places doing 3 course "menu del dia" for approx €10 - €12. Or maybe €15 if there's anything of slightly higher quality on offer.