Cook dinner the peas in boiling water for 3 minutes. Drain and funky with chilly running water. Establish the peas, basil, lettuce, vegetable inventory and 3⁄4 of the crème fraîche together in a blender and route of until soft. Originate this in two batches. Season, quilt and sit again for at least 1 hr sooner than serving. Add a swirl of remaining crème fraîche and wait on.