Ground Beef and Onion Gratin

Indulge in the ultimate comfort food with this Ground Beef and Onion Gratin, a layered dish bursting with flavor and rich textures. Tender caramelized onions, savory ground beef, and a velvety cheddar-infused béchamel sauce come together to create a hearty casserole that's topped with golden breadcrumbs and Parmesan for a satisfying crunch. Perfectly seasoned with garlic, thyme, and a touch of black pepper, this dish brings an irresistible savory depth to your dinner table. Ready in just about an hour, this gratin is easy to prepare and makes a cozy, crowd-pleasing meal for weeknight dinners or casual gatherings. Serve it hot and watch it disappear in moments!

Nutriscore Rating: 58/100

Prep Time:20 mins

Cook Time:40 mins

Total Time:60 mins

Servings: 4

Ingredients

• 1 pound ground beef
• 2 large yellow onion
• 3 cloves garlic
• 4 tablespoons unsalted butter
• 3 tablespoons all-purpose flour
• 2 cups whole milk
• 1 cup cheddar cheese, shredded
• 0.5 cup Parmesan cheese, grated
• 1 tablespoon olive oil
• 1.5 teaspoons salt
• 0.5 teaspoons black pepper
• 0.5 teaspoons dried thyme
• 0.5 cup breadcrumbs

Directions

Step 1

Preheat your oven to 375°F (190°C).

Step 2

Peel and thinly slice the onions. Mince the garlic.

Step 3

In a large skillet, heat olive oil over medium heat. Add the sliced onions and a pinch of salt. Cook, stirring occasionally, until the onions are soft and golden brown, about 10-15 minutes. Remove the onions from the skillet and set aside.

Step 4

In the same skillet, add the ground beef and cook over medium-high heat, breaking it up with a wooden spoon, until browned and fully cooked, about 7-8 minutes. Drain any excess grease.

Step 5

Season the beef with 1 teaspoon of salt, 1/2 teaspoon of black pepper, and the dried thyme. Stir in the minced garlic and cook for 1 minute. Transfer the cooked beef to a bowl and set aside.

Step 6

In a medium saucepan, melt the unsalted butter over medium heat. Whisk in the flour and cook for 1-2 minutes to create a roux. Slowly pour in the milk, whisking constantly to remove lumps. Continue stirring until the mixture thickens, about 3-4 minutes.

Step 7

Season the béchamel sauce with the remaining 1/2 teaspoon of salt. Remove from heat and stir in cheddar cheese until melted and smooth.

Step 8

In a greased 9x9-inch baking dish, spread half of the caramelized onions on the bottom. Layer with half of the cooked ground beef. Pour over half of the béchamel sauce. Repeat the layers with the remaining onions, beef, and sauce.

Step 9

Sprinkle the grated Parmesan cheese evenly over the top, followed by the breadcrumbs.

Step 10

Bake in the preheated oven for 25-30 minutes, or until the top is golden brown and bubbling.

Step 11

Remove from the oven and let the dish sit for 5 minutes before serving. Enjoy your Ground Beef and Onion Gratin!

Nutrition Facts

Serving size	1557.9 grams (1557.9g)

Amount per serving	% Daily Value*
Calories	2860

Total Fat 209.30g	268%
Saturated Fat 104.10g	521%
Polyunsaturated Fat 1.90g
Cholesterol 664mg	221%
Sodium 6294mg	274%
Total Carbohydrate 116.80g	42%
Dietary Fiber 8.20g	29%
Total Sugars 40.20g
Protein 150.50g	301%

Vitamin D 239IU	1193%
Calcium 2006mg	154%
Iron 14mg	79%
Potassium 2462mg	52%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 63.8%

Protein: 20.4%

Carbs: 15.8%