You would be about thirty years too late and subject to potential copyright and patent lawsuits.Another item....
I'd travel to the early 70's or late 60's and introduce microwave ovens
http://en.wikipedia.org/wiki/Microwave_oven
On October 8, 1945 Raytheon filed a U.S. patent for Spencer's microwave cooking process and an oven that heated food using microwave energy was placed in a Boston restaurant for testing. In 1947, the company built the Radarange, the first microwave oven in the world
Not to mention there was a microwave oven in the kitchen in E.T., back in 1982.