Instant Pot Instructions:

1. Turn Instant Pot to sauté setting. When display says HOT add in the butter and let it melt. Lightly salt and pepper the steaks and then sear both sides of each steak for about 3 minutes. Remove from pot and set on a plate.
2. Add onions into the pot and stir. The onions will help release the browned bits from the bottom of the pot as they release moisture. Let onions get soft, about 4 minutes. Add in the garlic and sauté for 30 seconds.
3. Pour in the water and scrape bottom of pot so that nothing is sticking. Stir the soup mix into the water. Turn off Instant Pot. Add in the steaks. 
4. Cover Instant Pot and secure the lid. Make sure valve is set to sealing. Set the manual/pressure cook button to 30 minutes. When time is up let pressure release naturally for 10-15 minutes. Move valve to venting and remove the lid. 
5. Place steaks on a plate. Turn Instant Pot to sauté setting. In a small bowl stir together 2-3 Tbsp of cornstarch with 3 Tbsp of water, until smooth. Then pour the mixture into the Instant Pot. The cornstarch mixture will thicken up the gravy quickly. Add salt and pepper to taste. Turn off Instant Pot.
6. Serve the steak with gravy over the top. 

Slow Cooker Instructions:

1. Heat a pan over medium high heat. Add in butter and let melt. Lightly salt and pepper the steaks and then sear both sides of each steak for about 3 minutes. Remove from pan and add to the slow cooker.
2. Add onions into pan and sauté for about 4 minutes. Add in the garlic and sauté for 30 seconds. Scrape into the slow cooker.
3. Pour water and soup mix into slow cooker.
4. Cover and cook on low for 8 hours.
5. In a small bowl stir together 2-3 Tbsp of cornstarch with 3 Tbsp of water, until smooth. Then pour the mixture into the slow cooker. Turn slow cooker to high and let the gravy thicken for 10-20 minutes. Add salt and pepper to taste.
6. Serve the steak with gravy over the top.