Step 1 and 2
Roast and puree butternut squash.
Make caramelized onions.
Step 3 and 4
Prepare tomatoes and make ricotta mixture.
Step 5 and 6
Coat baking dish with cooking spray. Spread about ½ cup tomato mixture in the bottom of the baking dish. Layer on three uncooked lasagna noodles.
Spread about half of the butternut squash mixture over the noodles. Top with about half of the onion. Dollop with half of the ricotta.
Step 7 and 8
Top with about 1 cup tomato mixture and 2/3 cup shredded cheddar.
Repeat with another layer until you are at the top. Do not add cheese to the top or it will stick to foil
Step 9 and 10
Cover with foil and bake for about 45 minutes.
Remove foil, add remaining cheeses and continue baking, uncovered, for 10 minutes. Let sit before slicing. Enjoy!