All the Green Things Salad

Ingredients

• 1 1/2 cups frozen green peas
• 1 pound asparagus, trimmed and cut diagonally into 2 1/2-in. pieces (4 cups)
• 12 ounces sugar snap peas, trimmed (about 4 cups)
• 3 tablespoons minced shallots
• 3 tablespoons extra-virgin olive oil
• 1 1/2 teaspoons grated lemon rind
• 2 tablespoons fresh lemon juice
• 1 tablespoon Dijon mustard
• 3/4 teaspoon kosher salt
• 1/2 teaspoon freshly ground black pepper
• 4 ounces pea tendrils, pea shoots, or watercress (about 5 cups)
• 1 cup loosely packed fresh flat-leaf parsley leaves
• 1/2 cup torn fresh mint leaves
• 1 firm, ripe avocado, cubed