Pour diced tomatoes over ground beef, along with 3 ingredients, into slow cooker for a comfort supper that I crave this week after week

the noodles are pushed down into the tomato and beef mixture so they are mostly submerged in liquid. If it looks very dry, you can add up to 1/2 cup of water, but only if needed so the pasta can cook properly.
Cover the slow cooker again and cook on HIGH for 25–35 minutes, stirring once halfway through, until the macaroni is tender but not mushy. Cooking time can vary slightly depending on your slow cooker, so start checking at about 20 minutes.
Macaroni stirred into tomato beef mixture
Macaroni stirred into tomato beef mixture