Cooking ennui (I love that word) sometimes snakes into my life, and usually I ignore it and make a simple potato or rice dish or ramen with veggies. Essentially, it's just boiling liquid, although with the replacement microwave a meal is just a zap away. Frozen veggies live in the freezer, often alongside frozen rice, so it's a simple, no-brainer task to make a quick, nutritious meal.
The real issue is when I've purchased items for a specific meal, and there's a risk of the food going bad if it sits around for too long. For that scenario I'm lucky, as there are a number of folks in my apartment building who I can call and invite to dinner, thereby forcing myself to cook or, perhaps a better way of saying it, motivating me to cook. Mostly my boredom comes from just cooking for myself. When Sweetie was alive, there was constant challenge, motovation, and excitement. There was always someone to cook for and often the challenge of cooking with sparse ingredients as Sweetie would sometimes let her larder get quite bare.
And then there are time when I just don't give a rat's patoot one way or another. Then I fire up the ol' chariot, head down to one of my go-to take away joints, grab a meal, and eat it at home. The thing that makes that work is that there are a quite a few good restaurants that offer take away, so one isn't relegated to fast food or burger joints.