Ingredients

1 lb ground beef
1 small onion, chopped (1/3 cup)
1 can (28 oz) crushed tomatoes
1 package (16 oz) penne pasta
1/2 teaspoon kosher (coarse) salt
1/4 cup finely shredded Parmesan cheese (1 oz)
2 tablespoons chopped fresh basil leaves
Freshly ground pepper

Instructions

In 10-inch nonstick skillet, cook ground beef and onion over medium-high heat, stirring frequently, until beef is thoroughly cooked; drain.
Spray 3 1/2- to 4-quart slow cooker with cooking spray. Place beef mixture in slow cooker; top with tomatoes.
Cover; cook on High heat setting 4 hours (or on Low heat setting 8 hours).
About 15 minutes before serving, cook and drain pasta as directed on package. Divide pasta among 4 serving bowls.
When sauce is done, stir in salt. Spoon meat sauce over pasta. Top individual servings with cheese, basil and pepper.