11 Heat the oil in pressure cooker over med heat. Add sausage and cook until browned about 5 minutes. Sir in onion, celery, red pepper, rice and garlic. Cook until vegetables get soft, about 2 min. Stir in the Cajun seasoning, bay leaf and 1/2 tsp salt. Add the stock, tomatoes and their juices.
2 Lock lid in place. Bring to high pressure over high heat. Adjust the heat to maintain pressure. Cook for 8 minutes.
3 In a medium nonstick skillet over med heat, cook the flour stirring often until it is toasted and turns beige, about 5 minutes. Transfer flour to bowl and set aside.
4 Remove the cooker from the heat and quickly release the pressure. Open the lid tilting it away from you to block any escaping steam.. Remove bay leaf. Gradually whisk about 1 1/4 cups of the cooking liquid into the flour to make a thin paste. Stir the paste into the cooker. Add okra. Cook uncovered occasionally stirring and breaking up the block of okra, until the okra is tender, about 10 minutes.
5 Stir in the shrimp and cook just until it turns pink and firm, about 1 minute. Season with additional salt.
Remove the cooker from the heat.