Preheat a 6-quart pot over medium-high heat. Sauté the onion, celery, and bell pepper in the oil with a big pinch of salt for 8 to 10 minutes, until the onion is lightly browned.
Add the garlic and sauté until fragrant, about 30 seconds. Add the nutritional yeast, thyme, oregano, red pepper flakes, and 1 teaspoon salt and toss to coat the veggies, letting the nutritional yeast toast a bit, for 2 minutes or so. Grind in fresh black pepper.
Add the broth and scrape the bottom of the pan with a wooden spatula to deglaze. Stir in the lentils. Cover and bring to a boil. Once boiling, lower to a simmer, keep covered and cook until lentils are somewhat tender, 20 to 30 minutes.
Add the diced tomato, tomato paste, olives, and kale. Bring to a boil, letting the kale wilt. Break the lasagna noodles up into about 3-inch pieces and stir them in. Cook until the pasta is tender, about 20 minutes. Stir occasionally and add a little water if things start to look too thick.
When the pasta noodles are cooked, dinner is ready! Stir in the fresh basil to wilt. Taste for salt and seasoning. Let sit for about 10 minutes so that the flavors can marry. Scoop into bowls, garnish with dollops of ricotta, the sliced olives, red pepper flakes, and more fresh basil.