Heat olive oil in a large skillet over medium-high heat. Add ground turkey and cook, breaking into small crumbles, until no pink remains.
Add diced carrot, onion, bell pepper, and garlic to the turkey; cook about 5 minutes until vegetables soften.
Stir in marinara sauce, Italian seasoning, Parmesan rind, bay leaf, and salt and pepper. Simmer on low for 15 minutes.
Meanwhile, boil lasagna noodles in well-salted water until al dente. Drain and lay flat on parchment to prevent sticking.
In a bowl, mix ricotta, egg, lemon juice, grated Parmesan, parsley, basil, and black pepper until smooth and combined.
Stir chopped spinach into the sauce during the last 2 minutes of simmering. Remove the Parmesan rind and bay leaf.
Spread 1 cup of sauce in the bottom of a 9x13-inch pan. Layer 4 noodles, half the ricotta mixture, 1 cup mozzarella, and more sauce.
Repeat layering: 4 noodles, remaining ricotta, 1 cup mozzarella, more sauce. Top with the final 4 noodles, remaining sauce, and mozzarella.
Cover the pan with a foil tent (avoid touching cheese) and bake at 375°F for 45 minutes until bubbling at the edges.
Remove foil and bake 10 more minutes, or until the center reaches an internal temperature of 165°F.
Cool completely on a rack for about 45 minutes. Portion into 8 airtight containers, label, and refrigerate up to 5 days.