Instructions:
- Preheat the oven to 375 degrees F (190 degrees C). Grease a 9×13 inch baking dish.
- Cook the pasta shells according to package instructions until al dente. Drain and set aside.
- In a large skillet, cook the ground beef over medium heat until browned. Drain any excess fat.
- Add the diced onion and minced garlic to the skillet and cook until softened, about 3-5 minutes.
- Add the chili powder, ground cumin, salt and pepper, diced tomatoes, and water to the skillet. Bring the mixture to a simmer and cook for 10-15 minutes, or until the sauce has thickened.
- Stuff the cooked pasta shells with the beef mixture and place them seam side up in the prepared baking dish.
- Sprinkle shredded cheddar cheese over the top of the shells.
- Bake the stuffed pasta shells for 20-25 minutes, or until the cheese is melted and the shells are heated through.
- Remove the shells from the oven and let them rest for a few minutes before serving. Garnish with chopped fresh parsley and sour cream, if desired.
