Early Summer Potluck Bake: Just 3 ingredients. I make this when I need a crowd-pleasing dish that practically cooks itself while I relax.

This three-ingredient oven bake is the kind of dish Midwestern potlucks were built on: simple, hearty, and so reliable you can put it in the oven and forget about it while you sit on the porch and listen to the birds. It’s just frozen cheese ravioli, a good jar of marinara, and plenty of shredded mozzarella layered into a glass casserole dish until it turns into one bubbling, glistening, golden-brown crusted mass. I started making this in the early 1990s when our church switched from Wednesday night suppers to more casual summer potlucks, and I needed something that could ride in the car, slide into someone else’s oven, and still come out tasting like I’d fussed all afternoon. It isn’t fancy, but it reminds me of the old hot-dish tables—every pan different, every one made with love and practicality in mind.

Serve this bake hot, straight from the glass dish, with a big green salad dressed lightly with vinegar and oil to cut through the richness. Warm garlic bread or buttered dinner rolls are perfect for scooping up the saucy edges that caramelize and bubble around the sides. A bowl of mixed olives or a simple plate of sliced cucumbers and tomatoes sprinkled with salt and pepper makes a nice, cool contrast. For a potluck, I like to set it on a trivet with a big serving spoon, a jar of red pepper flakes, and a shaker of grated Parmesan so folks can dress up their plate as they like.

Servings: 8-10

2 pounds frozen cheese ravioli (standard-size, not mini)

Preheat your oven to 375°F (190°C). Set a rack in the middle of the oven so the casserole browns evenly without scorching. Lightly grease a 9x13-inch glass baking dish with a bit of oil or cooking spray so nothing sticks.

Spread about 1 cup of the marinara sauce over the bottom of the glass dish, smoothing it into an even layer. This keeps the first layer of ravioli from drying out and helps create those nice, bubbling, saucy edges.

Arrange half of the frozen cheese ravioli in a single, snug layer over the sauce. It’s fine if they touch or overlap just a little, but try to keep them mostly in one layer so they cook evenly and stay tender.

Spoon and spread about 1 1/2 cups of marinara sauce over the ravioli, making sure to cover most of the pasta so no corners dry out. Sprinkle 1 1/2 cups of shredded mozzarella evenly over the sauced ravioli, going all the way to the edges to encourage that glistening, browned crust along the sides.

Repeat the layering with the remaining frozen ravioli, another 1 1/2 cups of marinara sauce, and the last 1 1/2 cups of mozzarella on top. Try to keep the final cheese layer even and not too clumpy in any one spot so it melts into a smooth, golden blanket.

Cover the dish tightly with foil, tenting it slightly so the foil doesn’t stick to the cheese. Place the dish on a baking sheet if you’re worried about bubbling over. Bake covered for 30 minutes, until the sauce is hot and the ravioli are cooked through and tender.

Carefully remove the foil and return the dish to the oven. Bake uncovered for another 15–20 minutes, or until the top is bubbling all over and the cheese has turned a deep golden brown in spots, with crisped, glistening edges around the sides of the glass dish.

If you like an extra-deep crust, you can move the dish to the top rack for the last 3–5 minutes, watching closely so the cheese doesn’t burn. When the top is richly browned and the edges are sizzling, remove the dish from the oven.

Let the bake rest on a cooling rack or stovetop for at least 10–15 minutes before serving. This short rest lets the bubbling settle and the layers firm up a bit, so you get tidy scoops instead of a runny mess. Then bring it to the table or potluck line and serve warm, scooping down through the golden crust to capture sauce, cheese, and ravioli in every portion.

You can tuck a lot of personality into this simple three-ingredient framework without making it fussy. For a meatier version, choose a marinara with Italian sausage or meat already in the sauce, keeping your ingredient list at three. If your crowd loves extra cheese, use part-skim mozzarella in the layers and reserve a handful of whole-milk mozzarella for the very top to deepen that golden, blistered crust. A thicker, chunkier marinara will give you a heartier, more rustic texture, while a smoother sauce will bake into a silkier, more uniform mass. If you prefer a lighter dish, look for a lower-sodium sauce and use a slightly thinner layer of cheese; the top will still brown beautifully. For smaller households, assemble the bake in two 8x8-inch glass dishes instead of one large one, and freeze one (unbaked and tightly wrapped) for a future busy night; bake from frozen at 350°F, covered, adding extra time until hot and bubbly, then uncover to brown the top. Food safety tips: Keep the frozen ravioli in the freezer until you’re ready to assemble, and don’t let them sit out for more than 30 minutes before baking. If you transport the unbaked casserole to a potluck, keep it chilled in a cooler with ice packs and bake it promptly upon arrival. Leftovers should be cooled, then refrigerated within 2 hours and eaten within 3–4 days; reheat in a 325°F oven, covered, until steaming hot in the center (165°F if you have a thermometer). Avoid reheating in glass directly from the freezer to a hot oven, as sudden temperature changes can cause the dish to crack—let it thaw in the refrigerator first.