Cook pasta according to package directions subtracting 3 minutes from the recommend cooking time. Drain and set aside.
16 ounces shell pasta
While the pasta cooks, brown ground beef over medium heat; stirring to crumble. Drain and return to pan. Mix in bell pepper, taco seasoning, cumin, black beans, Mexicorn, and green chiles. Cook for an additional 2 minutes. Remove from heat.
1 pound ground beef, 2 Tablespoons taco seasoning, 2 teaspoons cumin, 1/2 bell pepper, 1 can black beans, 1 can Mexicorn, 2 Tablespoons diced green chiles
In a small bowl, whisk together water, salsa, and sour cream. Stir into ground beef. Add pasta and 1 cup of shredded cheese. Stir to combine.
2/3 cup water, 1 cup fresh salsa, 1/3 cup sour cream, 1 1/2 cup shredded cheese
Preheat oven to 350 degrees. Spray a 9x13 baking dish with nonstick cooking spray. Add pasta mixture to baking dish. Top with remaining 1/2 cup of shredded cheese.
Bake in preheated oven for 10-15 minutes or until cheese is melted and bubbly.