Non-instant oatmeal takes 5 minutes. Eggs 2 minutes (but fine if you won't eat them). Broiling a steak takes 6 minutes. Broiling a salmon filet takes 15 minutes. A single serving of rice in a saucepan takes about 15 minutes. Steaming or sauteeing vegetables takes about 10 minutes, plus a few more to chop them up at the start (though not the insane time to dice tomatoes or onions). Boiling and mashing potatoes takes about 10 minutes.

These are the basic staples I use personally. Three meals a day, hand-cooked from scratch. Add to that something pre and post workout consisting of whey protein, fresh fruit, and possibly some maltodextrin or blended frozen berries, that don't need to be cooked, and that's my entire diet.

I never had to take a home ec class and my mom did not teach me to cook. The basics are pretty simple. Apply heat until what you're heating is sufficiently palatable or above a safe temperature for meats that is indicated directly on the thermometer. Working from home is pretty key, though, since I don't have to eat super early in the morning, super late at night, or reheat a soggy lunch in the break room microwave. I guess a more powerful stove helps, as it doesn't take me anywhere near 7 minutes to bring a pot to boiling.