An owner of a St. John's restaurant that won an international pizza competition in Las Vegas is open about revealing her secret ingredient: Newfoundland water.

Pi, which serves gourmet pizza from its restaurant on King's Road in downtown St. John's, picked up the top prize in the non-traditional category at the International Pizza Expo in Las Vegas last month.

Co-owner Meghan O'Dea, who attended the competition with Bart Pierson, said their winning recipe included lamb, water chestnuts, a tomato-mango chutney, a pesto base — and one ingredient that costs nothing, but valuable enough to take with them.

"We took Newfoundland water just straight out of the tap. [I] just threw it in my suitcase, and that was it," said O'Dea.

"I knew it was that because Vegas water is not that good."

O'Dea said the win has given Pi a significant boost, with record sales since scoring the win at the Pizza Expo.