5 tablespoons walnut oil or extra-virgin olive oil (divided)
2 cups fresh, shelled English peas
2 cups shelled, peeled fava beans
  grated zest of 1 lemon
  Sea salt (to taste)
1 large organic green apple, such as Granny Smith (unpeeled and cut into julienne matchsticks)
4 large radishes (cut into julienne matchsticks, about 1 cup)
1/2 cup thinly sliced scallions (white and green parts)
1/4 cup fresh chopped tarragon
1/4 cup fresh sliced mint leaves
1 tablespoon tarragon vinegar
1/2 tablespoon fresh lemon juice
  Freshly ground black pepper