Unroll crescent roll dough into a large rectangle; press the dough into your "brain" mold, leaving some dough hanging over the edge. 

Layer the dough with marinara, cheese, and pizza toppings until you reach the desired thickness. 

Fold remaining dough over the ingredients and seal together. 

Place mold exposed side up in your air fryer basket and cook at 360 for 15-18 minutes. Please note that the exposed dough (the bottom) will cook faster than the bottom. 

Carefully remove mold and cook in air fryer for an additional 3-5 minutes, or until the "brain" is lightly browned. Plate and enjoy!