Turn on the IP and select sauté. Once hot add oil, onion, and bell pepper. Cook 3-5 minutes or until vegetables are soft. Add garlic and cook an additional minute. Turn off the pressure cooker.
Add salt, pepper, thyme, paprika & crushed or diced tomatoes. Stir to mix well.
Dig 4 small holes in the tomato sauce. Add the prepared mushrooms, hollow side UP. It’s okay if they overlap, they’ll reduce in size while they cook.
Close lid and seal valve. Set high pressure and cook for 10 minutes. Quick release pressure when done.
Crack one egg into each portobello mushroom. Season each egg with a pinch of salt & pepper.
Close lid and seal valve. Set high pressure and cook for 1 minute. Quick release pressure when done.