About the simplest comfort food I know is pasta. For a quick, delicious dinner, you can make a sauce of melted butter, garlic, salt and herbs, and simply toss cooked spaghetti with it.
For a pound of spaghetti, about 1 stick butter, five or six medium cloves of garlic, and salt and herbs to taste. If you have some fresh parsley, oregano or basil, chop one or more up (a very generous handful). If not, just use dried herbs of your choice.
Peel and mince the garlic (or use a garlic press). Melt the butter in a sauce pan on low heat and add the garlic and herbs. Add salt to taste. Leave on very low heat while you boil the pasta in a big pot of heavily salted water.
The garlic should just turn a faint brown; then stop cooking and let the sauce sit. Drain the pasta and toss with the butter in a bowl. Sprinkle w a little grated parmesan.
A nice side dish is a Greek salad: chunks of tomatoes and cucumber and thinly sliced onions with olive oil and red wine vinegar, salt, pepper and oregano. These days, I actually wash the vegetables first with soap and water, then with plain water.