• 3 tablespoons olive oil
• 1 lb ground Italian sausage (You can also use ground Italian turkey sausage)
• 1 cup diced onion (about 1 large)
• 1 ½ cups diced celery (about 4 stalks)
• 1 ½ cups diced carrots (about 3-2 large)
• 1 ½ cup diced zucchini (about 1 small)
• 1 tablespoon minced garlic (2 large cloves)
• 2 teaspoons kosher salt
• 1 teaspoon freshly ground black pepper
• 1/2 teaspoon red pepper flakes
• 1 teaspoon dried oregano
• 2 cans diced tomatoes (14.5 ounces each, undrained)
