- Heat olive oil in a large soup pot over medium-high heat. 
- Add the chopped onions, salt, black pepper, and red pepper flakes. 
- Cook while stirring for about 2 minutes. 
- Include the chopped garlic and bay leaf into the pot. 
- Cook for another minute, maintaining gentle stirring to prevent sticking. 
- Add the rinsed split peas and chicken broth to the pot. 
- Bring the mixture to a boil, then lower the heat to a medium setting. 
- Allow the soup to cook, stirring occasionally, for about 1 hour or until the peas are tender. 
- If the soup begins to thicken too much, add a little more broth or water to reach your desired consistency. 
- Once the peas are tender, remove the bay leaf. 
- Taste and adjust seasoning with more salt and pepper if needed.