some bread you like(soft bread is good for this), cheese slices, tomato. optionally tuna or salmon if you can find some with decent price, maybe some spices(i like dill and oregano). You can also just skip the tuna/salmon, its pretty good with just cheese and tomato too.

Butter the bread, put tomato slice on it and cheese on top of it. Put it on oven and set it to 200c. Let them be there until cheese has properly melted and bread has toasted a bit. Take it out and put tuna on top of it or small slice of salmon. or put something else you like on it.

You can put the spices on top of the cheese before the oven or after it.

And naturally you dont have to make just one singular bread, make as much as you want.

Another food i have been occasionally making is mashed everything. I boil some potatoes, sweet potatoes and carrots until they are soft, then just mash them with the wooden.. smasherthingy..? (perunanuija). Add some cream if you want, also some salt and other spices you feel might work (again, i like dill and oregano, they go with everything. Some other spices might work for you better so experiment). If it tastes good, its done, if not you could try putting it on stove for some time so new ingredients mix up better.