Creating these Garlic Butter Knish Sliders involves several steps, but fear not! Follow this detailed guide, and you’ll have delicious sliders in no time.

Step 1: Prepare the Dough

1. Combine Dry Ingredients: In a large mixing bowl, combine the flour and salt.
2. Add Butter: Add the chilled, cubed butter to the flour mixture. Use a pastry cutter or your fingers to incorporate the butter until the mixture resembles coarse crumbs.
3. Mix Wet Ingredients: In a separate bowl, mix the sour cream and cold water.
4. Form the Dough: Add the wet ingredients to the dry ingredients, stirring until the dough comes together. If the dough is too dry, add an additional tablespoon of cold water.
5. Chill the Dough: Form the dough into a ball, wrap it in plastic wrap, and refrigerate for at least 30 minutes.

Step 2: Make the Filling

1. Cook the Potatoes: Boil the cubed potatoes in a pot of salted water until tender, about 15 minutes. Drain and set aside.
2. Sauté the Onions: In a skillet, heat olive oil over medium heat. Add the chopped onions and sauté until translucent.
3. Combine Ingredients: In a large bowl, mash the cooked potatoes. Add the sautéed onions, ground beef or mushrooms, salt, pepper, garlic powder, and parsley. Mix until well combined.

Step 3: Assemble the Knish Sliders

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Roll Out the Dough: On a floured surface, roll out the dough to about 1/8-inch thickness.
3. Cut the Dough: Use a round cutter, about 3 inches in diameter, to cut circles from the dough.
4. Fill the Sliders: Place a tablespoon of filling in the center of each dough circle. Fold the edges over the filling, pinching to seal.
5. Arrange on Baking Sheet: Place the sliders seam-side down on a parchment-lined baking sheet.

Step 4: Prepare the Garlic Butter

1. Melt the Butter: In a small saucepan, melt the butter over low heat.
2. Add Garlic and Parsley: Stir in the minced garlic and chopped parsley. Cook for about 2-3 minutes until fragrant.

Step 5: Bake the Knish Sliders

1. Brush with Garlic Butter: Generously brush each knish slider with the garlic butter.
2. Bake: Bake in the preheated oven for 20-25 minutes or until the sliders are golden brown.