Are you trying to lose weight or pack it on?

Either way, cmon, bro. There are hundreds of breakfast meals you can have. Hundreds.

Scrambled eggs on brown toast, poached eggs, lean cold cuts of meat, peanut butter on toast, cottage cheese, why not get a blender and throw some fruits in then top it up with milk..

Why are you eating only Oatmeal for dinner? I'm not surprised you're sick of your current breakfast, tuna/egg and cheese sounds filthy! haha.