What is your favorite simple dish that is under $1 per serving to make?

This sub has been really helpful for me to get ideas for quick simple meals to make while being on a tight budget and I don't have to break the bank in the process.<br><br>I have started making pasta with marinara sauce and it's always under $1 per serving and can be done in 15 minutes or less. I like to add garlic salt and a little bit of parmesan cheese to give some extra flavor. <br><br>What are your favorite simple dishes to make and that stay under $1 per serving?<br><br>&#x200B;