It’s usually just to take a small amount of delicious oil or fat — whatever you have on hand — and saute diced onions with diced bell pepper (or local equivalent) until the onions are slightly transparent. Keep going if you want the onions start being brown and have a sweet flavor. That brown is just the natural sugars coming out of the onion and is what “caramelizes means.” Caramel is sugar. And then add garlic and/or ginger and whatever spices you like.
If you want to add meat. If you don’t do not. (Often, that very oil step is done from browning meat and not wasting the fat.)
If you want soup, add a lot of liquid and whatever and cook it slowly. If you want paella, jambalaya, equivalent — every culture has a rice dish — use the rice recipe on the bag as if it were water. (Use stock if you have any but water works fine.)
There are dishes that are different. Like fried rice and French Toast use old rice and toast respectively. Baking is a science. But anyone can make a pot of delicious with a few ingredients and it’s a 10 minute, one pot meal.