Rinse the split peas under cold water and set aside.
In a large pot, heat olive oil over medium heat.
Add chopped onion, carrots, and celery; sauté until softened, about 5 minutes.
Stir in minced garlic and cook for another minute.
Add the rinsed split peas to the pot.
Pour in the vegetable broth and add the bay leaf.
Bring the mixture to a boil, then reduce heat to low.
Cover and simmer for about 45 minutes until the peas are tender.
Remove the bay leaf and blend the soup to your desired consistency.
Season with salt and pepper to taste.