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1
Set oven to 350 degrees F.
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2
Grease an 11 x 7-inch or a 13 x 9-inch baking dish.
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3
In a skillet melt butter over medium heat; add in the onions and saute stirring with wooden spoon for about 8 minutes or until lightly golden brown (adding in the garlic the last 2 minutes of cooking).
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4
Add in drained spinach and saute for 2 minutes more mixing with a wooden spoon; transfer to a large mixing bowl.
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5
Add in the cooked chicken, ricotta cheese, mozzarella cheese, Parmesan cheese, seasoned salt, egg and pinch nutmeg; mix with wooden spoon until well combined, then season with black pepper to taste.
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6
Place the cooked noodles on a wax paper lined flat surface.
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7
Evenly divide the ricotta mixute into eight scoops on to a plate.
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8
Spread about half of the alfredo sauce into the bottom of the baking dish.
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9
Spread one scoop onto one cooked lasagna noodle, then spread out with a spoon to cover the noodle completey.
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10
Roll up starting at the short end.
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11
Place seam side down on top of the sauce.
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12
Repeat same method with remaining 7 noodles.
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13
Sprinkle about 1 cup grated mozzarella cheese (or to taste) on top of the noodles, then drizzle the remaining alfredo sauce on top.
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14
Cover with foil and bake for about 30 minutes or until hot and bubbly.