Prep Time 20 minutes mins
Cook Time 22 minutes mins
Resting Time 10 minutes mins
Total Time 52 minutes mins
For the best texture, squeeze the spinach until very dry; excess moisture can cause soggy pinwheels. If using frozen spinach, thaw completely and wring out in a clean towel, using 10 ounces as a substitute for the fresh spinach. Puff pastry works best when cold, so keep it chilled and re-chill the filled log if it softens. You can assemble and refrigerate the log up to 12 hours ahead or freeze it for up to 1 month; slice from frozen and add 2 to 3 minutes to the bake time. Swap puff pastry with pizza dough for a chewier bite, or add 1/2 cup shredded mozzarella for extra melt. Serve with warm marinara for dipping, and store leftovers in an airtight container, then re-crisp in a 375°F oven for 6 to 8 minutes.