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This oven-baked beef and bell pepper Casserole is simple, hearty, and exactly the kind of dinner that makes the whole house smell incredible. Just four ingredients — ground beef, bell peppers, a jar of marinara, and cheese — and it comes together with barely any effort.
Why You’ll Love It
Only 4 ingredients — ground beef, peppers, sauce, and cheese. That’s genuinely it.
Budget-friendly — feeds six people without a trip to a specialty store or a big grocery bill.
The oven does the work — twenty minutes of active time, then you walk away.
The peppers get sweet and soft — layered under the beef and sauce, they Slow-cook into something really good.
Great leftovers — tastes just as good the next day, cold or reheated.
About the Ingredients
Four ingredients. That’s it, and I mean actually four — not “four plus twelve pantry staples I forgot to mention.” Ground beef, bell peppers, a jar of tomato sauce, and cheese. You don’t need anything else to make this work, though I’ll mention a few things worth thinking about.
The beef — I use 80/85% lean, because you want some fat in there for flavor. I’ve made it with the leaner stuff when that’s what I had, and it’s fine, but it’s a little flat. You drain off most of the grease after browning, so it’s not like you’re eating all of it.
Bell peppers: green is traditional, and green is what I use, but I’ve mixed in a red one or a yellow one when I had them sitting around getting soft in the crisper drawer. Sweeter. Also prettier, if that matters to you. It doesn’t always matter to me.
The sauce — any thick marinara will do. I’ve used a store brand, I’ve used the fancier stuff in the glass jars, I’ve used a mushroom variety once when I grabbed the wrong thing off the shelf and didn’t realize until I was already home. That version was actually pretty good. I wouldn’t go out of my way to buy it again, but it worked.
Cheese: I use Colby Jack almost every time because I always have it. Mild cheddar is fine too. If you use sharp cheddar, just know it’s going to taste sharper — which some people love and some people find a bit much for this particular dish. I usually end up using about two cups, maybe a little more than that, because I eyeball it and I’m not stingy with cheese.
How to Make It
Heat your oven to 375°F. Get out your 9×13 baking dish and just set it on the counter — you don’t need to grease it, you don’t need to line it with anything.
Brown the ground beef in a big skillet over medium-high heat. This takes about eight minutes, give or take. Break it up with a wooden spoon as it cooks. When there’s no more pink and it smells good, tip the pan and spoon off most of the grease — not all of it, just most of it. Leave a little in there.
Pour your sauce right into the skillet with the beef. Stir it around, let it bubble for a few minutes. This is where I usually taste it and decide if I want to add anything — sometimes I’ll shake in a little garlic powder, or some red pepper flakes if I feel like it — but you absolutely do not have to. The sauce is doing the heavy lifting.
Now, cut up your bell peppers and lay them in the bottom of the baking dish. I cut mine into strips, roughly. They don’t need to be uniform. Pour the beef and sauce over them and spread it out.
Cheese on top. Cover the whole thing with foil and put it in the oven.
Twenty-five minutes covered, then pull off the foil — be careful, the steam will get you if you’re not paying attention, I’ve got the hand scar to prove it — and put it back in for another ten or fifteen minutes until the cheese is melty and the edges are starting to brown.
Let it sit for five or ten minutes before you serve it. I know, I know. But it makes a difference.
Variations
A spicy version with chipotle-spiked sauce and pepper jack cheese is genuinely delicious — for the right household. I’ve tried it. It’s good. But it’s a different vibe entirely, and if anyone at your table runs mild, stick with plain marinara.
I tried a version once with Italian sausage instead of ground beef. The flavor was good but it felt like a different dish entirely — heavier, more assertive. Fine for what it was. Not really this recipe anymore.
Stretching it for more people: just serve it over egg Noodles. Don’t double the recipe — double the noodles. Trust me, it’s enough.
Leftovers
This keeps in the fridge for three or four days. I put it back in the baking dish with the foil over it, or sometimes I just transfer it to a storage container because I’m not trying to store a 9×13 dish in an already crowded refrigerator.
Reheat in the microwave or in the oven. In the oven it gets a little bit crispy around the edges again, which I prefer. Add a tiny splash of water if it looks dry before you heat it.
I will admit I have occasionally left this on the counter longer than I should have after dinner. I’m not recommending that. I’m just saying it happened, and it was fine, but that doesn’t mean it will be fine for you, so refrigerate your leftovers within a couple hours like an adult.
A Few Last Things
Serve it with whatever you want. I usually do egg noodles, or mashed potatoes, or just bread. A plain salad with a vinegary dressing is nice alongside it — something that cuts through the richness.
Oh — and if you’re making this for a holiday, or just a regular Tuesday when you need the house to smell like something good: this is the one. It’s the kind of dish that doesn’t announce itself. It just shows up, does the job, and quietly becomes the thing everyone remembers.
Oven-Baked 4-Ingredient Amish Beef and Bell Pepper Bake
Ingredients
- 1 lb ground beef
- 2 cups Pasta sauce
- 3 large bell peppers sliced
- 1.5 cups shredded cheese
Instructions
- Preheat oven to 375°F.
- Brown ground beef in a skillet, then drain excess grease.
- Add pasta sauce to the beef and simmer briefly.
- Layer sliced bell peppers in a baking dish.
- Pour beef mixture over peppers and spread evenly.
- Top with shredded cheese and cover with foil.
- Bake covered for 25 minutes, then uncover and bake 10–15 minutes more.
- Let rest 5–10 minutes before serving.