Breaks of 76 and 100 helped Allen blitz into a 3-0 lead before Ding belatedly registered on the scoreboard in the fourth frame but any hopes of a fightback were dispelled when Allen wrapped up victory with a 74 in the fifth.
"The way my form has been over the last few months, it's a big achievement to win here," said Allen.
"I was able to have a couple of hours rest after my semi-final whereas Ding had a long match, so maybe he was not as fresh as me for the final, though I'm sure he was just as motivated.
"The crowd and the atmosphere here were brilliant. Snooker is taking off in mainland Europe which is good to see."
Allen saw off seven opponents en route to taking the €25,000 top prize (£21,100).