Step 1: Prepare the Marinara Sauce - Pour the marinara sauce into the bottom of your baking dish. Spread it evenly to create a delicious base for your lasagna rolls.
Step 2: Sauté the Vegetables - In a large skillet, heat olive oil over medium heat. Add the sliced onion and sauté until translucent, about 5 minutes. Stir in garlic, broccoli, and mushrooms, seasoning with salt to taste. Cook for an additional 5-7 minutes until tender. Finally, add kale and cook until wilted. Remove from heat and let cool slightly.
Step 3: Mix the Cheese Filling - In a large mixing bowl, combine ricotta cheese, mozzarella cheese, cottage cheese, egg white, oregano, basil, and black pepper. Mix until well combined.
Step 4: Assemble the Rolls - Lay the cooked lasagna noodles flat. Spoon 2-3 tablespoons of cheese mixture onto each noodle, followed by sautéed vegetable mixture. Carefully roll each noodle up, starting from one end, and place seam-side down in the baking dish over marinara sauce.
Step 5: Top and Bake - Pour any remaining marinara sauce over the rolls. Sprinkle remaining mozzarella and Parmesan cheese over the rolls. Cover with aluminum foil and bake at 375°F (190°C) for 25 minutes. Remove foil and bake for an additional 10-15 minutes until cheese is bubbly and golden.
Step 6: Serve and Enjoy - Let the Veggie Lasagna Rolls cool for a few minutes before serving. Garnish with extra herbs if desired, and enjoy!