Description

Potato Knish Casserole takes all the comforting flavors of traditional knishes and transforms them into an easy, baked dish that’s perfect for sharing. Buttery mashed potatoes, caramelized onions, and a flaky pastry top come together in a warm, golden casserole that’s rich, satisfying, and full of nostalgia. This simplified version saves time without sacrificing flavor, making it an excellent choice for family dinners, holiday gatherings, or potlucks

Ingredients

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For the Filling:

4 large russet potatoes, peeled and cubed
1/4 cup unsalted butter
1/2 cup sour cream (optional, for extra creaminess)
2 large eggs, beaten
1 teaspoon salt
1/2 teaspoon black pepper
1/2 teaspoon garlic powder (optional)

For the Onions:

2 large onions, thinly sliced
2 tablespoons unsalted butter
1/2 teaspoon salt

For the Pastry Layer:

6 sheets phyllo dough (or 1 sheet puff pastry)
2 tablespoons melted butter (for brushing)

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Instructions

1. Prepare the Potatoes:

Boil the potatoes in salted water until fork-tender, about 15 minutes.
Drain and mash with butter, salt, pepper, and sour cream (if using). Let cool slightly.
Mix in beaten eggs.

2. Caramelize the Onions:

Heat butter in a pan over medium-low heat.
Add onions and salt, and cook for 15-20 minutes, stirring occasionally, until golden and soft.

3. Assemble the Casserole:

Preheat oven to 375°F (190°C).
Grease a baking dish and spread half of the mashed potatoes in an even layer.
Add the caramelized onions on top, then spread the remaining potatoes over them.
4. Add the Pastry Layer:
Lay phyllo sheets on top, brushing each with melted butter.
If using puff pastry, roll it out slightly and place it over the casserole, crimping the edges.

5. Bake Until Golden:

Bake for 30-35 minutes, until the top is golden brown and crisp.
Let cool slightly before slicing.

6. Serve and Enjoy:

Slice into squares and serve warm with sour cream or spicy mustard.

Notes

Potatoes: Russets create a fluffy texture, while Yukon Golds add extra creaminess.
Onions: Caramelizing them slowly brings out the best flavor.
Pastry Options: Use phyllo for a crispy top, puff pastry for a flakier crust, or pie dough for a heartier version.
Customization: Add shredded cheese, sautéed mushrooms, or fresh herbs for variety.

Nutrition

Serving Size: 1 slice
Calories: ~250 kcal
Sugar: 2g
Sodium: 350 mg
Fat: 12g
Saturated Fat: 7g
Unsaturated Fat: 5g
Trans Fat: 0g
Carbohydrates: 30g
Fiber: 3g
Protein: 5g
Cholesterol: 50 mg