"Unfortunatley no one can be told what the matrix is, you have to see it for yourself."
My wife was the same way. she voted and campaigned for Obama in 08 right before I met her. We disagreed on most of the gotcha political issues and she suspected I was paranoid. She has come to agree with me on just about everything. I think at this point she knows I'm telling the truth, but part of her still doesn't want to believe that she had ever not known it all. Its gotta be tough to accept somebody who wants to tear down everything you thought the world was...
My method was to not directly oppose her or force feed the red pill, because that would only solidify her opposition more. she was not ready to accept truth so i had to present it slowly, piecemeal. Gently and indirectly inject the idea. Socratic questioning is effective too, but think it through beforehand.
For food issues, I just totally took on the role of cook. She went from eating out and microwaving boxed food to eating home cooked meals out of the garden. I took it as my responsibility to to make my fresh food taste better than the stuff with msg and aspartame. Herbs, spices, the 'fond' from seared meat can have onions sauteed on it and then deglazed with any liquid for an awesome pan sauce. and it cleans your pan.
"The War Prayer - Mark Twain"