Healthy Cheeseburger Casserole

INGREDIENTS

1 tbsp

extra virgin olive oil

1 lb

lean ground beef

1 cup

finely diced yellow onion

1 cup

finely diced carrot

1/2 cup

finely diced celery

1/3 cup

finely diced red bell pepper

2 cloves

garlic, minced

3 cups

low sodium beef broth (plus more, if needed)

1/3 cup

ketchup

15 oz

can tomato sauce

3 cups

whole wheat elbow macaroni

1 1/2 cups

grated cheddar cheese

salt and pepper