Pasta with tomato sauce (just a tin of tomatoes, garlic, onions, herbs, salt).
Having a rice cooker is great - just put rice, frozen vegetables and ham/chicken in there, then when it is finished, crack an egg on top and let the steam cook it. Take it out and add sesame oil and soy sauce. Instant fried rice.
Smoothies - whatever fruit you have, and add oatmeal, seeds and nuts to bulk it up (helps with low mood too).
Baked potato with tuna and sweetcorn or beans
Beans and egg with whatever (sausage, chicken nuggets), surprisingly healthy, considering
Steak - all you have to do is put it in the pan
A tin of coconut milk, some peanut butter, curry paste and one of those ready cut packs of vegetables is a really nice curry
What I do with a lot of things is make twice or three times the amount and then freeze it. Then when I can't be arsed, I still have something healthy to eat.
Even just having snacks around like healthy crackers, brown bread, dried fruit, ready cut cheese, cherry tomatoes etc is useful for me. It gives me the energy I need to make something more substantial.
It's horrible when you can't be bothered cooking and it only makes your mood worse. I totally sympathise, I've been there loads.