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1
Preheat oven to 350 degrees F.
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2
Heat butter in large saute pan over medium heat.
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3
Add onions and mushrooms and cook until tender.
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4
Add garlic, tomato sauce, 1 teaspoon salt and sugar and simmer for 10 minutes.
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5
In another saute pan cook ground beef until brown and drain juices.
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6
Add the cooked spinach to the beef and stir.
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7
In a large bowl add eggs and ricotta cheese and mix with hand blender until smooth.
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8
Stir in the mozzarella, Parmesan cheese, remaining 1/2 teaspoon salt, parsley and pepper.
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9
Add the meat and cheese stuffing together and mix well.
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10
Pour 1/2 tomato sauce in bottom of casserole dish.
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11
Stuff each jumbo shell and place side by side in dish.
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12
Pour the rest of the tomato sauce over the top of shells.
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13
Bake for 30 minutes uncovered and in the last 5 minutes, sprinkle Parmesan cheese over shells.
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14
Tip: Place cooked noodles in cold water right before use to prevent noodles from sticking to each other.
