Prep Ingredients: Chop your vegetables and rinse the split peas under cold water.
Sauté Vegetables: Turn the Instant Pot to the sauté setting. Add olive oil. Once hot, add the onion, garlic, carrots, and celery. Sauté for about 3-5 minutes until the vegetables start to soften.
Add Peas and Liquids: Add the rinsed split peas, corn, chicken or vegetable broth, bay leaves, and dried thyme to the pot. If using, add the ham bone or diced ham. Season with salt and pepper.
Cook the Soup: Secure the lid on the Instant Pot and set the valve to "sealing." Select the "Manual" or "Pressure Cook" setting and set the timer for 15 minutes at high pressure.
Natural Release: After the cooking time is complete, let the Instant Pot release pressure naturally for 10 minutes. Then, carefully turn the valve to "venting" to release any remaining pressure.
Final Touches: Remove the bay leaves (and ham bone, if used). Stir the soup, adjust salt and pepper to taste. If the soup is too thick, add a little more broth or water to reach your desired consistency.
Serve: Ladle the soup into bowls and garnish with chopped fresh parsley.
Enjoy Your Sopa De Chicharos!