Bought a different (no pre cooking type) brand as I couldn't get my usual one. Assembled the lasgna as always - alternating white sauce, pasta sheets and red sauce. Baked as per instructions on the box - 180 for 30 minutes.
When I inserted the knife, the pasta sheets were still quite hard. I have returned it to the oven but worried it will be a dried up block now. Any suggestions to salvage it?