1-Getting started: with these mushroom puff pastry pinwheels is a breeze, and I’ll walk you through it step by step. First, melt 4 tablespoons of butter in a large sauté pan over medium heat. Add the 12 ounces of finely diced mushrooms along with 1/8 teaspoon dried thyme leaves, 1/4 teaspoon salt, and 1/4 teaspoon black pepper, then sauté until the mushroom liquid evaporates and they turn slightly brown and caramelized. Let this mixture cool completely to avoid any sogginess in your pastry.

2-Next, roll out the sheet of puff pastry into a uniform rectangle about 10 by 12 inches. Spread the cooled mushroom mixture evenly across the pastry surface, making sure it’s well distributed. Carefully roll the pastry starting from one long side, like a jelly roll, to form a tight log.

3-After that, refrigerate the roll for 20 minutes to firm it up, or wrap and freeze it for later use if you’re planning ahead. Once chilled, slice the roll into 1/4-inch thick rounds and place them on a parchment-lined baking sheet. Brush each round with the egg wash made from 1 egg beaten with 3 tablespoons water for a golden finish.

4-Finally, bake at 425°F for 12 to 15 minutes until they’re golden brown and heated through, then serve immediately. The total preparation and cooking time is around 40 to 45 minutes, including sautéing, assembly, chilling, slicing, and baking. This step-by-step approach keeps things simple and fun, perfect for busy parents or students looking to impress without much fuss.