Ovenable flexible packaging structures

A method of making a laminated web, comprising:

• providing an outer ply comprising a paper substrate, the outer ply having a first major surface and a second major surface opposite the first major surface;
• forming a cutout defining a window in the outer ply;
• providing an inner ply comprising a heat sealable polymer film, the inner ply having a first major surface facing the second major surface of the outer ply, the inner ply having a second major surface opposite the first major surface of the inner ply;
• forming a perforation region comprising a plurality of perforations bounded within the perforation region on the inner ply;
• applying an adhesive to one or both of the second major surface of the outer ply and the first major surface of the inner ply;
• and
• forming a laminate by bringing the outer ply and the inner ply into contact, wherein, in the laminated web, the outer ply and the inner ply are in registration with each other such that the perforation region is substantially overlapping with the window region.