In a large stock pot add 5 Q. water and two tablespoons of salt. Once the water is at a rolling boil add in bow tie pasta.
Heat your cast iron skillet to medium-high heat. Add two tablespoons of olive oil and sweet Italian sausage. Use a wooden spoon to break apart and brown your sausage.
Once your sausage is cooked, remove it from the skillet. Keep remaining juices in the skillet.
To your skillet add red bell peppers, yellow bell peppers, sweet onions, Portobello mushrooms, and seasonings.
Cook your vegetables until they have softened.
Add the sausage back to the skillet along with cooked bowtie pasta (you might not use all of the pasta).
Add your remaining 2 tablespoons of olive oil, spinach, tomatoes and parmesan. Cook for another 5 minutes..