Lightly grease or spray with non-stick spray a 9x13 inch baking pan and preheat the oven to 375.
Finely chop the green pepper and onion.
Place the pepper and onion in a skillet with a small amount of your preferred cooking oil or butter and sauté over medium heat until the onion is translucent and the pepper is softened.
Add in ground beef, and seasonings and continue cooking, stirring and crumbling as it cooks until it is cooked through.
While the meat mixture is cooking place a large pot of salted water on high heat and bring to a boil. Cook the pasta shells to al dente according to the package directions. Drain and rinse with cool water.
Add 1 cup of salsa and into the cooked ground beef and stir until well mixed.
Add in ½ cup of shredded cheddar cheese and continue mixing until cheese is melted and well incorporated.
Scoop the ground beef mixture into each pasta shell and place in the prepared pan.
Repeat until all of the pasta shells are filled.
Pour 1 cup of salsa around and across the shells.
Sprinkle 1 cup of shredded cheese across the top of the shells.
Place in the oven and bake for 20 minutes.
Serve warm with additional taco toppings if desired.