In a skillet over medium-high heat, crumble and brown the ground beef until fully cooked.
Drain the excess fat from the skillet.
Season the ground beef with black pepper and Sazon seasoning, adjusting the amount to taste.
In another skillet, add the olive oil and brown the shell pasta until it develops a golden color.
Once the pasta is browned, add it to the skillet with the ground beef.
Incorporate the remaining ingredients into the skillet, including the water, tomato broth, chicken broth, Serrano peppers, Rotel diced tomatoes with green chilis, yellow onion, and chopped parsley. Stir to combine all the ingredients thoroughly.
Cover the skillet and reduce the heat to a simmer.
Allow the mixture to cook until the pasta shells are tender and have absorbed the flavors of the sauce.