Heat olive oil in a large pot over medium heat. Add onion and cook until softened, about 5 minutes.

Add garlic and cook for 1 minute more.

Add peas and vegetable broth to the pot. Bring to a boil, then reduce heat and simmer for 20 minutes, or until peas are tender.

Carefully blend the soup with an immersion blender or in a regular blender until smooth.

Season with salt and pepper to taste.

Serve hot, garnished with fresh mint.