Prepare the pasta: Cook the macaroni according to package instructions. Drain and set aside.
Make the sauce: In a blender or food processor, combine the pumpkin/ pumpkin puree, cashews, nutritional yeast, almond milk, lemon juice, Dijon mustard, garlic powder, onion powder, smoked paprika, salt, and pepper. Blend until smooth and creamy. Taste and adjust seasoning as needed.
Heat the sauce: Pour the blended sauce into a saucepan and heat over medium-low heat, stirring frequently until the sauce thickens slightly (about 5-7 minutes). You want it to be warm but not boiling.
Prepare Bread Crumb Topping: Combine the bread crumbs with oil, salt, and either chopped fresh thyme leaves (ensure to remove leaves from stalk) or dried thyme.
Combine pasta and sauce: Add the cooked pasta to the sauce and stir until the pasta is fully coated.
Assemble Dish: Transfer the pasta mixture to a casserole dish (24cm x 16cm x 4cm deep) , level it out, and evenly spread the bread crumb topping over it.
Bake: Bake for 5 minutes in the oven or until the bread crumbs are golden brown or 3-5 minutes in an airfryer or until the breadcrumbs go golden.
Serve and enjoy!