Oven-Baked 5-Ingredient Beef & Onion Foil Packet Dinner
This simple oven-baked beef and onion foil packet dinner is a hearty, no-fuss meal made with tender steak, sweet caramelizing onions, and perfectly roasted potatoes. Everything cooks together inside foil packets, locking in flavor and juices for a comforting and easy dinner with minimal cleanup.
Ingredients
- 1 1/2 pounds beef steak thinly sliced sirloin or round
- 2 large yellow onions thinly sliced
- 1 1/2 pounds baby potatoes halved or cut into 1-inch chunks
- 3 tbsp olive oil
- 2 tsp steak seasoning or all-purpose seasoning blend
- salt to taste (optional)
- black pepper to taste (optional)
Instructions
- Preheat the oven to 400°F (200°C). Line a large baking sheet with foil and prepare four large sheets of heavy-duty foil.
- Thinly slice the onions and halve the baby potatoes. Pat the beef dry and slice into strips if needed.
- In a large bowl, toss the potatoes and onions with olive oil, steak seasoning, and optional salt and pepper until evenly coated.
- Divide the potato and onion mixture evenly among the foil sheets, placing the mixture in the center of each.
- Top each pile with an equal portion of the sliced beef.
- Fold the foil over the ingredients and seal the edges tightly to form packets, leaving a little space inside for steam.
- Place the foil packets on the baking sheet and bake for 30–35 minutes until the potatoes are fork-tender and the beef is cooked through.
- Carefully open one packet to check the potatoes. If needed, reseal and bake another 5–10 minutes.
- Let the packets rest for 3–5 minutes before serving. Serve directly in the foil or transfer to bowls and spoon juices over the top.
Notes
You can add sliced bell peppers or mushrooms to the packets for extra flavor and vegetables.
Nutrition
Calories: 520kcal
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