1 and ½cupsfrozen chopped spinachthawed (see note 1)
17ouncesfrozen puff pastry sheetssee note 2
Heat olive oil in a medium pan of medium heat. Once hot, add shallots and diced mushrooms. Sprinkle with ½ teaspoon salt. Saute until the mushrooms have released their juices, about 5-7 minutes. Add garlic and saute a minute more, until garlic is golden.
Transfer mushroom filling to a heat safe mixing bowl. Stir in the goat cheese and thawed spinach (make sure to drain any excess liquid from the spinach). Cover and transfer to the fridge to cool for at least 30 minutes, or until the mixture is cool to the touch.
Preheat the oven to 350 degrees F. While the filling is cooling, remove puff pastry from the freezer and let thaw according to package instructions.
Once the pastry is mostly thawed (it should be pliable but not completely room temperature), slice into 24 pieces of 2 in x 3 in rectangles using scissors or a knife.
Pat each pastry square into a tin. Fill with ~2 teaspoons (a scant tablespoon) of filling. Fold pastry corners into the center, pinching to close. If the edges don't stay closed you can use a drop of water to seal them in place.
Bake for 15-18 minutes at 350 degrees F, or until golden brown.
When the pastries are golden brown and flaky, remove from the oven. Turn out of the muffin pan and cool on a cooling rack. Enjoy!
Spinach: Measure out 1 and ½ cup of frozen spinach then thaw in the microwave or on the stove according to package instructions. It only needs to come to room temp, not completely hot. Squeeze out excess liquid by pressing in a fine mesh colander or patting with a paper towel.
Puff pastry sheets can be found in the freezer aisle. I use these Pepperidge Farms frozen pastry dough sheets, which fill exactly 24 mini muffin tins.
To make in regular muffin tins: Double the size of the puff pastry slices and double the amount of filling per pastry.
Storage and reheating: Let cool before refrigerating in a closed container. Reheat in the microwave, or crisp in a 350-degree oven for 5-10 minutes.