the best chicken lasagna

Ingredients For the best chicken lasagna

• 2 Tbsp

  butter
• 1/2 lg

  onion
• 1

  (10 1/2-ounce) can cream of chicken soup, undiluted
• 1

  (10-ounce) container refrigerated alfredo sauce
• 1

  (7-ounce) jar diced pimiento, undrained
• 1

  (6-ounce) jar sliced mushrooms, drained
• 1/3 c

  dry white wine
• 1/2 tsp

  basil, dried
• 1

  (10-ounce) package frozen chopped spinach, thawed
• 1 c

  cottage cheese
• 1 c

  ricotta cheese
• 1/2 c

  freshly grated parmesan cheese
• 1

  large egg, lightly beaten
• 9

  lasagna noodles, cooked
• 2 1/2 c

  chopped cooked chicken
• 3 c

  (12 ounces) shredded sharp cheddar cheese - divided