Gladys Sweet Onion Sausage Casserole
Indulge in the comforting flavors of Gladys Sweet Onion Sausage Casserole, a hearty and flavorful dish that brings together caramelized sweet onions, savory Italian sausage, and creamy layers of cheesy potatoes. Perfectly seasoned with dried thyme, black pepper, and a touch of sharp cheddar and mozzarella, this casserole is topped with golden, crispy panko breadcrumbs for the ultimate texture. With its rich cheese sauce and melt-in-your-mouth layers, this casserole makes an irresistible centerpiece for family dinners, potlucks, or holiday feasts. Ready in just over an hour, this dish serves six and is a true crowd-pleaser that combines the warmth of classic comfort food with gourmet flair.
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Recipe Information
Ingredients
- 1 pound mild Italian sausage
- 2 large sweet onions
- 2 tablespoons unsalted butter
- 2 tablespoons all-purpose flour
- 1.5 cups whole milk
- 1 cup shredded sharp cheddar cheese
- 1 cup shredded mozzarella cheese
- 0.5 teaspoons salt
- 0.5 teaspoons black pepper
- 0.5 teaspoons dried thyme
- 4 medium russet potatoes
- 0.5 cup panko breadcrumbs
- 1 tablespoon olive oil
- 2 tablespoons fresh parsley
Instructions
Preheat your oven to 375°F (190°C) and grease a 9x13-inch casserole dish with cooking spray or butter.
Peel and slice sweet onions thinly. Heat a large skillet over medium heat, add butter, and sauté the onions until caramelized and golden brown, about 15 minutes. Remove from skillet and set aside.
In the same skillet, cook the sausage over medium heat, breaking it up with a wooden spoon, until browned and fully cooked. Drain excess fat and set aside.
Peel the potatoes and slice them into thin rounds, about 1/8-inch thick. Set aside.
In a medium saucepan over medium heat, melt 2 tablespoons of butter. Stir in the flour and cook for 1-2 minutes until the mixture forms a paste. Gradually whisk in the milk, stirring constantly to avoid lumps. Cook until slightly thickened, about 3-4 minutes.
Remove the saucepan from heat and stir in sharp cheddar cheese, mozzarella cheese, salt, pepper, and dried thyme until smooth and creamy.
Layer half of the sliced potatoes in the bottom of the prepared casserole dish. Top with half of the cooked sausage and half of the caramelized onions. Pour half of the cheese sauce over the top.
Repeat the layers with the remaining potatoes, sausage, onions, and cheese sauce.
In a small bowl, toss the panko breadcrumbs with olive oil until evenly coated. Sprinkle the breadcrumb mixture over the casserole.
Cover the dish loosely with foil and bake in the preheated oven for 30 minutes. Remove the foil and continue baking for another 15 minutes, or until the top is golden brown and bubbly.
Remove the casserole from the oven and let it cool for 5-10 minutes. Garnish with freshly chopped parsley before serving.
Nutrition Facts
Calories |
3826 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 225.2 g | 289% | |
| Saturated Fat | 101.1 g | 506% | |
| Polyunsaturated Fat | 1.7 g | ||
| Cholesterol | 675 mg | 225% | |
| Sodium | 8093 mg | 352% | |
| Total Carbohydrate | 264.0 g | 96% | |
| Dietary Fiber | 20.8 g | 74% | |
| Total Sugars | 58.8 g | ||
| Protein | 195.0 g | 390% | |
| Vitamin D | 4.0 mcg | 20% | |
| Calcium | 2410 mg | 185% | |
| Iron | 15.7 mg | 87% | |
| Potassium | 5113 mg | 109% | |
*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.
