Black-Eyed Peas and Greens Soup

Name: Black-Eyed Peas and Greens Soup
Prep time: 15 min
Cook time: 3 h
Total time: 3 h 15 min
Cuisine: American, Cajun And Creole, Southern
Ingredients: 1 tablespoon vegetable oil; 1 cup onion (diced); 1 cup celery (diced); 1/2 cup sweet bell pepper (red or green, diced); 4 to 6 ounces ham (diced); 4 cloves garlic (minced); 4 cups chicken stock; 3 cups cooked black-eyed peas (or 2 (15-ounce) cans, drained and rinsed); 1 1/2 cups turnip greens (or spinach, frozen, thawed, and chopped); 2 (14.5-ounce) cans tomatoes (diced); 1/2 teaspoon Creole seasoning (or more, to taste); 1/4 teaspoon freshly ground black pepper; 1/4 teaspoon dried oregano; Optional: kosher salt, to taste