This dish is called Train Smash because it looks like one when you shove it on yer plate.
1 casserole dish
Some herbs and stuff like that
Turn the stereo up loud. Shout in tune, and tell anyone who complains to FUCK OFF.
Slice up everything. Get it all together in the dish in layers. Start with a layer of onions, then tomatoes, then cheese. Do this until you fill the dish or it's at least an inch thick. You can sprinkle herbs in as you do this, if you want. Put extra cheese on top and bake it in a moderately hot oven until the cheese starts to go brown.
Serve with a spoon by scooping up lumps.