Heat a frying pan or skillet over medium/high heat. Add olive oil and swirl to coat.
Season sausage with a pinch of salt and pepper. Brown the sausage. Drain sausage over a bowl and pour the drippings back into the pan and add sausage to the slow cooker.
Next, add onions, crushed tomatoes, sun dried tomatoes, tomato paste, red pepper flakes, wine, and a pinch of salt and pepper to the hot pan. Sauté for 5 minutes then add minced garlic. Cook for 1 more minute, then pour into the slow cooker.
Add vegetable broth, Italian seasoning, granulated garlic, onion powder, salt, and black pepper to the slow cooker. Cover, and set to low for 6 hours.
At the 6 hour mark, break apart the lasagna noodles and add to the slow cooker to soften for 30 minutes.
Add chopped kale to the slow cooker for the final 10 minutes of cooking time.
Prepare the cheese mixture. Combine ricotta, mozzarella, parmesan, basil, parsley, and garlic salt in a small bowl and mix.
Serve lasagna in a bowl with a dollop of ricotta cheese and a sprinkle of parmesan. Enjoy!