Preheat oven to 400F.
Slice each mushroom in half lengthwise. Use the end of a plastic straw to dig out two eye sockets. Use a paring knife to create a triangle nose and vertical lines in the stem for the teeth. Place face side up on a parchment paper lined cookie sheet.
Drizzle with olive oil and season with salt & pepper. Bake at 400F for 15 minutes.
Meanwhile, cook pasta according to the package, adding 5 drops of food dye to water.
Drain pasta and add garlic powder, red pepper flakes, and salt & pepper to season.
In small saucepan, melt 1/4 cup butter and cook until it begins to brown. Remove from heat and add spinach allowing it to wilt.
Pour browned butter and spinach over pasta and serve with roasted mushrooms.
