Vegetable Cheese Lasagna
["4 tsp. margarine", "3 c. thinly sliced mushrooms", "4 tsp. olive oil", "1 c. chopped onions", "6 garlic cloves, minced", "14 to 15 oz. can tomato sauce", "1 c. canned diced tomatoes", "1 1/2 tsp. salt, divided", "1 tsp. each: oregano leaves and basil leaves", "1/2 tsp. pepper, divided", "1 bay leaf", "2 (10 oz.) pkg. frozen chopped spinach, thawed and well drained", "15 oz. carton part skim Ricotta cheese", "1 egg, beaten or 1/4 c. egg substitute", "8 oz. pkg. lasagna noodles, uncooked", "12 oz. shredded Monterey Jack cheese, divided"]
["Mushroom Layer:", "In a 10-inch skillet, heat margarine over medium heat until bubbly and hot; add mushrooms and saute, stirring occasionally, until mushrooms are lightly browned and cooked through, 2 to 3 minutes.", "Remove from heat and set aside."]
["margarine", "mushrooms", "olive oil", "onions", "garlic", "tomato sauce", "tomatoes", "salt", "oregano", "pepper", "bay leaf", "Ricotta cheese", "egg", "lasagna noodles", "shredded Monterey Jack cheese"]