Tuscan Lasagna

Ingredients

• 1 pound 85-percent-lean ground beef
• 1 cup sliced cremini mushrooms
• 1/2 cup minced white onion
• 2 garlic cloves, crushed
• 4 tablespoons chopped fresh parsley
• 1 tablespoons salt
• 1 1/2 teaspoons dried basil
• 1 teaspoon Italian seasoning
• 1/2 teaspoon fennel seeds
• 1/4 teaspoon freshly ground black pepper
• 1 cup lowfat ricotta
• 1 package (8 ounces) whole-grain lasagna noodles
• Vegetable oil cooking spray
• 16 ounces low-sodium marinara sauce, divided
• 1/2 cup part-skim fresh mozzarella, divided
• 2 cups thawed frozen spinach
• 1/3 cup grated Parmesan