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Export 12 ingredients for grocery delivery
Preheat the pressure cooking pot on the Browning/Sauté setting. Add the ground beef and onion and cook until beef is browned and crumbled. Add garlic and sauté 1 minute more.
Stir in green peppers, spinach, tomatoes, tomato sauce, beef broth, rice, Worcestershire sauce, salt, and pepper. Lock lid in place, select High Pressure and 4 minutes cook time. When timer beeps, do a natural release for 10 minutes, then release any remaining pressure with a quick pressure release.
Turn off pressure cooker and pour casserole into an oven-safe baking dish. Sprinkle the cheese on top of casserole and broil until the cheese is melted and starting to brown.