Start by making sure that your frozen meatballs are thawed out. Continue by placing them in the crock of a slow cooker.
Prepare the bell pepper by cutting it in half, from top to bottom. Remove the stem and the "guts" and cut the cleaned bell pepper into long thin slices. Place the sliced in the crock with the meatballs.
Add the Peperoncini peppers to the slow cooker with a ¼ cup of its brine from the jar. If you want to reduce the heat in the dish, replace the brine with ¼ more liquids like broth or water.
Sprinkle in the onion soup mix and the ranch seasoning before pouring the broth into the slow cooker.
Stir all of the ingredients together until well combines, and then place the pieces of butter on the top of the meatball mixture.
Place the lid on the slow cooker and turn it on HIGH for 4 hours.
After the 4 hours, remove the lid. Whisk together the cornstarch with the ¼ cup of cold water to make a smooth slurry. Pour it over the cooked meatballs and gently stir it in with the liquids in the slow cooker.
Place the lid back on the slow cooked and set on HIGH for another 30 minutes to allow the sauce to thicken.
Stir the Mississippi Meatballs so that everything is covered in the thickened sauce and serve hot over mashed potatoes or rice.
Notes
Where did I find Ranch Seasoning in my grocery store;Since the Ranch seasoning in question is made by the brand Club House, I wrongly "assumed" that I would find it in the spices aisle. Nor was it with the pouches of powdered gravies and sauce, nor with the instant soups. I finally found it sitting on a shelf in the salad dressing section. As much as this is obvious to me now, it definitely was not at the time. I hope this helps in your search for this illusive pouch! :)