Want a tasty, textured pea soup that tastes like springtime? You have to start in the freezer section of the supermarket to get the best results. I like frozen peas to build the base of the soup and then enrich it, last minute, with some fresh peas. Lots of people add bacon or Parmesan to garnish, and that's all fine to me, but I largely prefer the crunch of fresh peas or pea tops (a true sign of spring) and a dollop of sour cream. Use whatever peas are at the supermarket, sugar snap or snow peas.
In a large, heavy-bottomed pot, heat the oil over medium heat. Add the scallions and a generous pinch of salt and pepper. Cook until the scallions are tender, 2 to 3 minutes, then add the peas, stock and 1 cup of water. Bring to boil, then simmer over medium heat and cook for about 5 minutes to allow the peas to soften further.
Using a jar blender, carefully puree the soup until smooth (see Cook's Note). Pour the soup back into the pot, then add the sour cream and honey, and gently warm for 1 to 2 minutes. Taste for seasoning. Garnish the bottom of each serving bowl with the fresh pea slices and basil leaves. Ladle the soup on top and serve.
When blending hot liquid, first let it cool for five minutes or so, then transfer it to a blender, filling only halfway. Put the lid on, leaving one corner open. Cover the lid with a kitchen towel to catch splatters, and pulse until smooth.