Spanish lentils soup.

Fry some onion, garlic and chorizo (you can fry it directly in the pot with some olive oil).

Add water, lentils, potatoes, tomatoes, bay leaf, salt.

Cook.

Eat.

Delicious. It's maybe 15 minutes of chopping and hour or two of cooking. If you have some pressure cooker it's fast and easy. Without it it takes longer but it's still really easy, just stir from time to time. Try it once to figure out the proportions but it's hard to mess up.