Are these foods giving me IBS? For breakfast every morning i eat three peices of toast with grape jelly and two cinnamon poptarts wit hot tea. For lunch some days I either eat tuna fish plain right out of the can with nothing in it, beefaroni one or two days, or Underwood chicken spread in the can with a cup of hot tea. For desert I eat brownies, devil dogs, or cupcakes. For supper I usually just eat peanut butter and marshmallow fluff every night with hot tea. I eat nothing else at night but maybe Hershey bars, cookies.