Add the Thai basil, nuts, onion, garlic, nutritional yeast and oil into a food processor and blend into a paste. The result should be a thick green paste, not a watery one. Add more olive oil if needed.
In the pre-heated cast iron sauteuse, add the pesto mixture, and stir-fry for a few minutes or until fragrant.
Add the spices (chilli flakes, Tabasco, salt, pepper, lemon juice) and stir together for another few minutes
Fold in the pasta with the pasta water, and gently combine.
In your cast iron grill, add the broccoli stems and lemon slices. Grill until light brown.
Add the veggies as toppings and serve hot!