Instant Pot Creamy Beef and Shells

Name: Instant Pot Creamy Beef and Shells
Prep time: 15 min
Cook time: 13 min
Total time: 28 min
Cuisine: American
Ingredients: 1 Tbsp vegetable or avocado oil; 1 lb. ground beef (I use 85/15); 1 medium yellow onion (diced); 3 cloves garlic (minced); 1 Tbsp dried Italian seasoning; 1 tsp kosher salt; 1 tsp garlic powder; 1/2 tsp black pepper; 1/4 tsp crushed red pepper flakes (optional but recommended); 2 Tbsp tomato paste (** see "chef tips" #1); 16 oz dried medium shells pasta; 24 oz jar marinara sauce (Rao's is my favorite); 2 cups reduced sodium beef broth; 1 cup water; 2 - 3 oz cream cheese (cubed and softened to room temperature); 1 cup heavy whipping cream; 3/4 - 1 cup grated Parmesan cheese (freshly grated is best); minced fresh parsley (for garnish); additional black pepper (for garnish)