preheat oven 375°F

line two baking sheets with parchment paper

melt 1tbsp butter in a large frying pan at over Medium heat.

add onion and cook, stirring occasionally until soft and translucent, 5 to 7 min

remove pan from heat and let cool completely. drain! praying out any excess water. pat very dry with paper towels.

finely chop spinach mixture. whisk eh white in a medium bowl. add clotted spinach and feta. stir to mix evenly

lay one sheet of Phyllis on the counter. cover remaining Phyllis sheets with a dampened kitchen towel. working