INGREDIENTS
1 tbsp
extra-virgin olive oil
1 lb
Italian sweet sausage, removed from casings
2 cups
onion, diced
1 cup
celery, diced
1 cup
carrots, diced
2 cups
red bell pepper, diced (about one large pepper)
2 tbsp
fresh garlic, minced
red pepper flakes
1/4 cup
tomato paste
5
fresh plum tomatoes, diced