Start by preparing the aromatic base. Peel the onion from the outer, dry skins, cut it in half and place the flat side on the cutting board. Chop it into small cubes. Place the garlic cloves on the board and crush them with the flat side of the knife - this will make it easier to remove the skin. Then chop it very finely.
Description
This is not just an ordinary recipe, but rather a culinary philosophy of wise cooking and food waste reduction, dressed in the form of a delicious and hearty casserole. This dish is a tribute to all the leftovers in the fridge – yesterday's roasted chicken, a few boiled potatoes, a lonely carrot, or the end of a cheese. Thanks to the magical combination in a creamy egg and cheese sauce, these seemingly mismatched ingredients transform into a cohesive, aromatic, and incredibly appetizing dish. The 'Clean Fridge' casserole is the essence of home warmth and thriftiness. Its flavor is different every time, unique, dictated by the contents of our fridge. Visually, it presents beautifully – a golden, crispy cheese crust hides a wealth of colors and textures beneath. It’s the perfect solution for a quick dinner in the middle of the week when time and ideas are lacking. Serve it with a simple salad to create a wholesome and balanced meal for the whole family.
Ingredients (13)
- Chicken eggs 4 szt.
- 18% cream 200 ml
- Yellow cheese (e.g. gouda, cheddar) 150 g
- Onion 1 szt.
- Garlic 2 ząbki
- Rapeseed oil 30 g
- Carbohydrate base from leftovers 500 g
- Protein base from leftovers 300 g
- Vegetable broth from scraps 300 g
- 🌿 Przyprawy
- Salt 0.2 szczypt
- Ground black pepper 2 szczypty
- ✨ Opcjonalne
- Chives 0.2 pęczków
- Dijon mustard 10 g
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Preparation steps
Preparation of the flavor base
In a large skillet (about 28 cm in diameter), heat the rapeseed oil over medium heat. To check if it's ready, toss in a small piece of onion - it should start to sizzle. Add the chopped onion and sauté for about 5-6 minutes, stirring occasionally with a wooden spoon, until it becomes soft and translucent (it will become glazed). In the last minute of cooking, add the minced garlic and sauté until it releases its aroma. Be careful not to burn it, as it will become bitter.
Preparation of the egg and cheese mixture
In a large bowl, prepare a mixture that will combine all the ingredients. Crack the eggs into it. Using a whisk or fork, vigorously beat them for about a minute until the whites and yolks are completely combined, creating a uniform, slightly frothy mixture.
Add the cream (or yogurt), salt, and pepper to the beaten eggs. If using, add the Dijon mustard now for extra sharpness. Whisk everything together thoroughly until you achieve a smooth, uniform sauce without lumps.
Grate the yellow cheese on a coarse grater. Add about 2/3 of the grated cheese to the egg mixture and mix. Set aside the remaining cheese (1/3) - you will sprinkle it on top of the casserole to create a crispy crust.
Assembling the casserole
Prepare a baking dish in which you will bake the casserole (optimal size is about 20x30 cm). Grease the bottom and sides of the dish thoroughly with butter or oil so that the casserole does not stick and can be easily removed.
In a large bowl (it can be the one you used to prepare the egg mixture, if it's big enough), place all your leftovers: the carbohydrate base (e.g., sliced potatoes), the protein base (e.g., shredded chicken), and vegetables. Add the sautéed onion with garlic. Gently mix everything with a large spoon.
Pour the combined leftovers with the previously prepared egg and cheese mixture. Using a large spoon or spatula, gently but thoroughly mix everything so that the sauce reaches every nook and cranny and evenly coats all the ingredients.
Transfer the entire mixture to the prepared baking dish. Spread it evenly using a spoon or spatula, gently pressing down to fill the entire dish and create a flat surface.
Baking
Preheat the oven to 180°C with the top and bottom heating function on (without convection). Remember to place the dish in the already preheated oven – this is crucial for the right texture.
Evenly sprinkle the reserved grated cheese over the top of the casserole. Place the dish in the preheated oven and bake for about 30-35 minutes. The casserole is ready when the egg mixture is completely set (check by inserting a stick in the center - it should come out dry), and the cheese on top is melted and beautifully golden brown.
After removing from the oven, let the casserole rest for at least 10 minutes before slicing. This step is very important because the hot casserole needs to 'rest' for its structure to stabilize. This way, it can be cut into neat portions that won't fall apart.
Before serving, sprinkle the casserole with freshly chopped chives, if using. This will add freshness and crunch to the dish. Serve warm, either as a standalone dish or with a light salad.
Fun Fact
Zapiekanki, as a way to use leftovers, gained immense popularity in the United States during the Great Depression in the 1930s. They were a symbol of thriftiness and resourcefulness of housewives who could create a nutritious meal from a small amount of ingredients. Today, in an era of increasing awareness about food waste, this idea is making a comeback.
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Tips
Serve the casserole hot, straight from the dish. A simple salad of arugula or butter lettuce with vinaigrette will be the perfect complement, balancing the richness of the dish with its freshness and acidity. It can also be served with a dollop of sour cream or your favorite sauce, such as garlic sauce.
The remaining casserole can be stored in the refrigerator, in the same dish (covered with foil) or transferred to an airtight container, for up to 3 days. It can be reheated whole in the oven (160°C for about 15 minutes) or in portions in the microwave. It also tastes great cold.
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