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1
Steam spinach until tender.
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2
Press out excess moisture and chop coarsely.
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3
Chop mushrooms and onions and mince garlic.
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4
Saute mushrooms, onions and garlic in 2 tbsp (30 ml) olive oil over medium-high heat, until onions are tender.
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5
Drain excess liquid and cool.
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6
Mix ricotta cheese, 2/3 cup (150 ml) Parmesan cheese, egg, salt, pepper, basil and oregano in large bowl.
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7
Add cooled spinach and mushroom-onion mixture.
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8
Mix on mixer's low speed just until blended.
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9
Cook lasagna according to package directions.
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10
Rinse under cool water and drain thoroughly.
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11
Preheat oven to 350 degrees (175 C.).
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12
Place four lasagna strips in bottom of lightly oiled 9 x 13 inch pan, overlapping slightly.
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13
Top with 2 cups (475 ml) of spinach filling.
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14
Sprinkle with 1-1/2 cups (350 ml) shredded Mozzarella cheese and 1/3 cup (80 ml) Parmesan cheese.
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15
Repeat layering two more times, and top with remaining four lasagna strips.
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16
Spread 1 cup (225 ml) of marinara or tomato-cream sauce over top and cover tightly with foil.
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17
Bake in preheated oven, covered, for 1 hour.
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18
Remove from oven and keep warm at least 30 minutes before cutting.
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19
Top with extra parmesan cheese.
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20
(Can be refrigerated a day in advance of baking if desired.)