Peel away outer 2-3 layers of Leeks and thoroughly wash under running water
Thinly slice leeks
Wash mushrooms and remove bottom of stem and slice in medium slices
Saute leeks in 1/2 stick of butter and 1 TB of Olive Oil
Season with salt, pepper, and rosemary leaves
Add three sprigs of rosemary and 1/2 tsp of sugar and cook on med-low for 12-15 minutes
Push leeks to side of pan and add 1 TB of butter and 1 TB of Olive Oil and the Mushrooms
Season with salt, pepper and 1/2 tsp of Thyme and cook for additional 5 minutes
Mix the leeks with the mushrooms and add 1/4 tsp of crushed red pepper and cook for l minute then remove from heat and remove the sprigs of rosemary and set aside
Unroll pie crust on parchment lined baking sheet
Cut up cooked sprigs of rosemary and push into edges of pie crust every inch or so then flip the crust over
Fill middle of pie crust with shredded Gouda cheese leaving a two inch border then top with leek and mushroom mixture spreading evenly over the shredded cheese
Top the leek mixture with romano cheese then bring up the 2 inch border evenly around the galette showing the inlaid rosemary leaves while leaving the center open
Brush the border crust evenly with egg yolk and sprinkle lightly with romano and a few red pepper flakes around the border for color
Bake at 425 degrees for 20 minutes until golden brown - watch so you do not over cook