Rinse the split peas under cold water and drain.
In a large pot, heat olive oil over medium heat.
Add chopped onions, carrots, and celery; sauté until softened.
Stir in minced garlic and cook for an additional minute.
Add the rinsed split peas to the pot.
Pour in the broth and add the bay leaf.
Bring the mixture to a boil, then reduce heat to low.
Cover and simmer for about 45 minutes, stirring occasionally.
Remove the bay leaf and season with salt and pepper.
Blend the soup for a smoother texture or leave it chunky as desired.