Add the stock, onion/garlic powder, tuna, soup and pasta to the instant pot.
Stir together and put the lid on. Set on high pressure for 4 minutes.
Leave under pressure for another 4 minutes and then do a quick release.
Remove the lid and add the peas and cheese.
Allow the cheese to melt for around 3 minutes.
If serving with the topping, add the bread, cheese and paprika to a food processor and blitz to a fine crumb. Either sprinkle evenly over the casserole and air fry for 3 minutes or remove to an ovenproof dish and add the topping before grilling (broiling) until the topping goes crispy.
Serve and enjoy.
Calories: 584kcal | Carbohydrates: 75g | Protein: 39g | Fat: 14g | Saturated Fat: 7g | Cholesterol: 58mg | Sodium: 1515mg | Potassium: 556mg | Fiber: 4g | Sugar: 4g | Vitamin A: 3691IU | Vitamin C: 4mg | Calcium: 224mg | Iron: 3mg