Noticing how oatmeal for dinner is making a comeback for health and savings

Lately, I see more folks turning to plain oatmeal with cheap add-ins like frozen fruit or a spoon of peanut butter for a filling dinner. It costs pennies per serving and helps cut down on grocery bills while keeping meals simple. My own family has been doing this twice a week, and it's helped our budget and made weeknight cooking less stressful. Have you tried any similar cheap tweaks to your evening meals?