One Pot Chicken and Shrimp Gumbo



3 tablespoons vegetable oil
⅓ cup all-purpose flour
2 red bell peppers, ribs and seeds removed, chopped
1 medium onion, finely chopped
2 garlic cloves, minced
1 teaspoon dried oregano
1 tablespoon of tomato paste
4 cups chicken broth
1 tablespoon hot sauce (optional)
Coarse salt and ground pepper
1 package (10 ounces) of frozen sliced okra
8 ounces smoked pre-cooked sausage such as andouille or kielbasa, cut into ½ inch thick slices
4 cups of shredded chicken
½ pound of large shrimp