1. Heat oven to 375 degrees F. Coat a 2-quart baking dish with nonstick cooking spray. Bring a large pot of lightly salted water to boiling.
2. Cook bacon in a nonstick skillet over medium heat until just crisp, 10 minutes. Drain on a paper towellined plate.
3. Meanwhile, cook spaghetti 9 minutes in boiling water. Drain and return to pot.
4. In a large bowl, whisk together eggs and yolks. Add 2/3 cup of the cheese, the milk, half-and-half, parsley, salt and pepper. Toss sauce with pasta in pot along with bacon. Transfer to prepared dish and top with remaining 2 tbsp Parmesan.
5. Bake at 375 degrees F for 35 minutes. Cool 10 minutes, then cut into wedges.
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