Pour tomato sauce into medium pan. Add salt, sugar, mushrooms ... layer of uncooked lasagna in parallel strips in bottom ... before cutting. Serves 6-8.
Preheat oven to 350 degrees. ... 13x9x2 inch baking pan, pour 1 cup sauce, ... minutes before serving. Lasagna may be assembled in advance ... or may be frozen.
Prepare White Sauce. Melt butter in 1 quart sauce pan. Stir in flour, salt ... keep warm. Prepare lasagna. Separate frozen spinach under ... 10 minutes before cutting.
Place spinach on a paper ... in bowl. Cook lasagna according to package. Coat a 12 x 8 x 2 inch baking pan with cooking spray. Lay 3 ... for 5 more minutes.