Philly Cheesesteak Stuffed Shells

Ingredients

• 1 lb. lean ground beef
• 2 tbsp. butter
• 1 tbsp. garlic, minced
• 1 small onion, diced
• 1 c. shredded cheese (cheddar, provolone, American)
• 1 small red bell pepper, diced
• 1 tbsp. Worcestershire sauce
• 2 tbsp. ketchup
• ½ tsp. salt
• ½ tsp. pepper
• ½ lb. favorite cheese cut into ½ inch cubes (cheddar, provolone, American)
• 24 jumbo pasta shells
• 1 ½ c. milk
• 1 ½ c. beef broth
• 4 tsp. cornstarch