Chop the onion, garlic, and mushrooms.
In a skillet, heat olive oil to medium high. Add the chopped onion and garlic and sauté until the onion is translucent.
Add the chopped mushrooms to the onion and sauté until fully cooked.
Add ground chicken thighs to the skillet and stir until completely cooked. Then add the salt, pepper, and prego sauce.
In a separate bowl combine the parmesan cheese, ricotta cheese, cottage cheese, and half & half.
Cook the lasagna sheets according to the package.
In a deep 9x13 inch baking dish spread about 1/4 cup of the meat sauce. Then spread 4 sheets of cooked lasagna on top. Or enough sheets to cover the entire surface.
Add half of the meat sauce on top of the lasagna sheets. Add half of the cheese mixture on top of the meat sauce. Then sprinkle about 1 cup of mozzarella cheese.
Add 4 more sheets of lasagna, the other half of the meat sauce, the other half of the cheese mixture, and 1 cup of mozzarella. If you want, add some extra Parmesan cheese on top as well.
When covering the baking dish with foil, try not to let the foil touch the cheese so it doesn't stick to it. Bake at 370 degrees for 1 hour. Cooking time may vary depending on the oven. Note: This can be prepared a day ahead of time and kept covered in the fridge until ready to bake. Just make sure to give the baking dish 10-15 minutes to warm up at room temperature before putting it into the oven to avoid temperature shock and cracking the dish. Also, you may need to add a few extra minutes of bake time if it was in the fridge.