One-Pan Creamy Pasta

1. In a large pan over medium heat, add the oil and butter. 
2. Add the medium shells to the pan, stirring to coat them in the oil.
3. Pour in the chicken broth, cover, and cook until the pasta is al dente and has absorbed most of the broth.
4. Stir in the tomato paste, heavy cream, and season with salt and pepper to taste.
5. Once the cream has thickened, remove the pan from heat and garnish with additional salt, pepper, and fresh parsley before serving.