Step 1

In a medium soup pot, cook the bacon over moderate heat until browned and crisp, about 6 minutes. Transfer the bacon to a plate. Pour off the fat in the pot.

Step 2

In the same pot, heat the olive oil. Add the celery, onion and leek and cook over moderately low heat, stirring occasionally, until softened but not browned, about 7 minutes. Add the chicken stock, 4 slices of the cooked bacon, 1 rosemary sprig and a pinch each of salt and white pepper. Simmer until the vegetables are very tender, about 15 minutes. Discard the bacon and rosemary. Using a slotted spoon, transfer the vegetables to a blender.

Step 3

Meanwhile, bring a medium saucepan of salted water to a boil. Add the sugar snaps and cook for 3 minutes. Add the frozen baby peas and the parsley and cook just until heated through, about 1 minute; drain. Add the sugar snaps, baby peas and parsley to the blender and puree until smooth, adding a few tablespoons of the broth to loosen the mixture. Transfer the soup and the remaining broth to a large bowl set in a larger bowl of ice water to cool.

Step 4

In a small saucepan, bring the heavy cream, garlic and remaining rosemary sprig to a boil. Simmer over low heat until slightly reduced, about 5 minutes. Strain the garlic cream into a bowl and let cool.

Step 5

Ladle the chilled pea soup into bowls and drizzle with the garlic cream. Crumble the remaining 4 slices of bacon into each bowl and serve.