Heat olive oil in a large pot over medium heat.
Add the chopped onion, carrots, and celery; sauté for 5-7 minutes until softened.
Stir in the minced garlic and cook for another minute.
Add the rinsed split peas, broth, bay leaf, and thyme to the pot.
Bring the mixture to a boil, then reduce heat to a simmer.
Cover and let it simmer for about 45 minutes, stirring occasionally.
Remove the bay leaf and season with salt and pepper to taste.
If desired, use an immersion blender for a smoother texture.
Serve hot, garnished with a drizzle of olive oil or fresh herbs.
Enjoy your hearty and nutritious split pea soup!