Chef John's Red Beans and Rice

Ingredients

• 1 pound dried red kidney beans
• 1 tablespoon vegetable oil
• 1 large onion, diced
• 1 green bell pepper, diced
• 2 stalks celery, diced
• 3 cloves garlic, minced
• 1 pound andouille sausage, sliced
• 1 teaspoon dried thyme
• 1 teaspoon dried oregano
• 1 teaspoon paprika
• 1/2 teaspoon cayenne pepper
• 4 cups chicken broth
• 2 cups water
• Salt and pepper to taste
• 4 cups cooked white rice
• Green onions, for garnish