My grandpa ate this every single week during hard times. Just 3 ingredients and it kept his whole family full for pennies.

This slow cooker 3-ingredient poor man’s potato and onion gravy is exactly the kind of dish families leaned on during hard times: filling, comforting, and incredibly inexpensive. My grandfather’s generation stretched a few pantry staples into a full meal, and this is very much in that spirit. Potatoes provide the bulk, onions bring sweetness and flavor, and a simple, store-bought brown gravy mix ties everything together into a silky sauce. It’s the kind of recipe you make when you need to feed a crowd for pennies, using a slow cooker to do the work while you get on with your day.

Serve this potato and onion gravy straight from the slow cooker into shallow bowls, with plenty of the glossy onion gravy spooned over each portion. It’s hearty enough to stand on its own with just some sliced bread or toast for dipping, but it also works well over cooked rice, egg noodles, or thick slices of day-old bread to stretch it even further. If you have them on hand, a simple side of frozen peas or green beans adds color and freshness without adding much cost. Leftovers reheat well and can be turned into a next-day skillet hash with a fried egg on top.

Servings: 4

2 pounds russet or yellow potatoes, peeled and cut into 1-inch chunks

Prepare the potatoes by peeling them and cutting into roughly 1-inch chunks. Try to keep the pieces about the same size so they cook evenly and stay tender without falling apart.

Peel the onions, then cut them in half from root to tip and slice them thinly into half-moons. The thin slices will soften and almost melt into the gravy during the long slow cook, giving you that silky, golden brown sauce with bits of caramelized onion throughout.

Lightly grease the inside of your slow cooker crock with a small amount of oil or butter if you have it on hand; this is optional but helps prevent sticking and makes cleanup easier.

Layer the sliced onions evenly over the bottom of the slow cooker. This acts as a flavorful bed for the potatoes and keeps them from scorching on the bottom.

Spread the potato chunks on top of the onions in an even layer. Do not pack them too tightly; leaving a bit of space helps the gravy circulate and coat each piece.

In a medium saucepan or heatproof bowl, prepare the brown gravy mix according to the package directions using the 4 cups of water. Whisk well to dissolve any lumps. You want a smooth, fairly thin gravy at this stage; it will thicken slightly as it cooks with the potatoes and onions.

Pour the prepared brown gravy evenly over the potatoes and onions in the slow cooker, making sure all of the potatoes are at least partially submerged. Gently press down any pieces that are sticking up so they are coated in the liquid.

Cover the slow cooker with the lid and cook on LOW for 6 to 7 hours, or on HIGH for 3 to 4 hours, until the potatoes are very tender when pierced with a fork and the onions are soft and golden, with a rich, glossy brown gravy surrounding them.

Once the potatoes are tender, gently stir from the bottom with a large spoon, lifting the onions and gravy up over the potatoes. Be careful not to mash the potatoes; you want them to stay in tender chunks smothered in sauce.

Taste the gravy and adjust the seasoning only if needed. Most brown gravy mixes contain salt, so you may not need any additional seasoning. If the gravy is thicker than you like, stir in a splash of hot water. If it is thinner than you prefer, leave the lid off and cook on HIGH for another 15 to 20 minutes to reduce slightly.

Turn the slow cooker to WARM and let the dish sit for 10 to 15 minutes before serving. This short rest helps the potatoes soak up a bit more of the gravy and gives you that classic, silky coating on every piece.

Serve the potato chunks in bowls or on plates, spooning plenty of the onion-rich brown gravy over the top. Keep the slow cooker on WARM so seconds stay hot and ready.

To stay true to the spirit of a poor man’s meal, this recipe uses only three affordable ingredients, but there are a few ways you can adapt it based on what you have. If you find a different type of potato on sale, such as red potatoes, you can use those instead; just keep the chunks similar in size. For a slightly deeper flavor without adding new ingredients, let the onions sit in the bottom of the slow cooker on HIGH for 20 to 30 minutes before adding the potatoes and gravy, stirring once; they will begin to brown around the edges and give a more caramelized taste. If you ever have a leftover heel of bread or toast, this dish is excellent poured over it, turning it into a very filling plate. You can also stretch leftovers by stirring in a little cooked rice or noodles on the second day. If you do have pantry extras like black pepper, garlic powder, or a bay leaf, they can be added to the gravy before pouring it over the potatoes for more depth, but they are optional and not necessary for the base recipe. Food safety tips: Always wash and dry your potatoes before peeling and cutting to remove dirt and surface bacteria. Use a clean cutting board and knife, especially if you have handled raw meat beforehand; wash them thoroughly before starting this recipe. When using dry gravy mix, check the expiration date on the packet and discard if it is past date or has an off smell. Make sure your slow cooker heats properly; on HIGH, the contents should reach a simmer within a couple of hours. Once the potatoes and gravy are cooked, do not leave the slow cooker on the WARM setting for more than 3 to 4 hours. Cool leftovers quickly by transferring them to shallow containers and refrigerating within 2 hours of cooking. Reheat leftovers until they are steaming hot all the way through before serving, and use refrigerated leftovers within 3 to 4 days.