Baked Tomato Onion Casserole
Savor the delightful simplicity of this Baked Tomato Onion Casserole, a rustic dish that combines layers of juicy tomatoes, sweet caramelized onions, and a crispy Parmesan breadcrumb topping. Perfect as a side dish or a vegetarian main, this casserole highlights fresh, wholesome ingredients like ripe tomatoes, garlic, and fragrant thyme, baked to golden perfection. With minimal prep time and a melt-in-your-mouth texture, it’s a comforting yet elegant addition to your dinner table. Serve it warm and garnish with fresh parsley for a burst of color and flavor. Whether you're hosting a dinner party or planning a cozy family meal, this tomato onion casserole is sure to impress!
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Recipe Information
Ingredients
- 6 large tomatoes
- 2 large yellow onions
- 3 tablespoons olive oil
- 3 cloves garlic
- 2 teaspoons fresh thyme
- 1 teaspoon salt
- 0.5 teaspoon black pepper
- 0.75 cups breadcrumbs
- 0.5 cups grated Parmesan cheese
- 2 tablespoons fresh parsley
- 2 tablespoons butter
Instructions
Preheat your oven to 375°F (190°C).
Slice the tomatoes and onions into 1/4-inch thick rounds and set them aside.
Heat 2 tablespoons of olive oil in a large skillet over medium heat. Add the onions and cook for 8-10 minutes, stirring occasionally, until they become soft and lightly caramelized.
Mince the garlic and add it to the skillet with the caramelized onions. Sauté for another minute until fragrant, then remove the skillet from heat.
Lightly grease a 9x13-inch baking dish with 1 tablespoon of olive oil.
Arrange a layer of tomato slices in the bottom of the baking dish, slightly overlapping each slice. Sprinkle with a pinch of salt, black pepper, and thyme.
Spread half of the caramelized onion mixture evenly over the tomato layer.
Repeat the layers—another layer of tomatoes, seasoning, and the remaining onions.
In a small bowl, mix together the breadcrumbs, grated Parmesan cheese, and fresh parsley. Melt the butter and stir it into the breadcrumb mixture until evenly combined.
Sprinkle the breadcrumb mixture evenly over the top layer of the casserole.
Bake in the preheated oven for 25-30 minutes, or until the topping is golden brown and the casserole is bubbling around the edges.
Allow the casserole to cool for a few minutes before serving. Garnish with additional parsley if desired.
Nutrition Facts
Calories |
1373 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 84.4 g | 108% | |
| Saturated Fat | 28.5 g | 142% | |
| Polyunsaturated Fat | 5.5 g | ||
| Cholesterol | 106 mg | 35% | |
| Sodium | 4506 mg | 196% | |
| Total Carbohydrate | 130.3 g | 47% | |
| Dietary Fiber | 19.4 g | 69% | |
| Total Sugars | 42.4 g | ||
| Protein | 38.9 g | 78% | |
| Vitamin D | 0.1 mcg | 1% | |
| Calcium | 664 mg | 51% | |
| Iron | 7.0 mg | 39% | |
| Potassium | 2534 mg | 54% | |
*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.
