1Add dry spaghetti to a pot of boiling salted water.
Once spaghetti has been cooked according to package directions, drain and set aside (rinse under cool water to prevent pasta from sticking together.
2Meanwhile-use large cast iron skillet-heat olive oil.
Add onions till caramelized and 1/2 way through cooking onions add bell peppers.
3Once bell peppers are softened and onions translucent, add minced garlic and saute until fragrant.
4Add marinara sauce, crushed red pepper and cooked pasta.
5Simmer over low medium heat 10 minutes.
6Shrimp may be added to this recipe and other veggies if you like.. (Like tomatoes, parsley, red crushed pepper, olives and adding spices and heavy creme.