What are some inexpensive dinner ideas?

Other than spaghetti or Alfredo. Those are what we usually have as a backup for when we need something quick and easy or I don't really feel like cooking.

It's just my husband and I, and he is a picky eater. I plan out our meals for 2 weeks at a time and I'm in a rut. I don't need super cheap meals, just wanting to change things up, without spending more than usual.

Although it is just the two of us, I still make a normal size batch of each meal so we can have leftovers.