Instant Pot Chicken and Braised Radishes with Dukkah

Name: Instant Pot Chicken and Braised Radishes with Dukkah
Ingredients: ½ cup plain yogurt; ¼ cup tahini; 6 garlic cloves , minced, divided; 4 teaspoons grated lemon zest , divided, plus 2 teaspoons juice; 2 tablespoons minced fresh parsley; 4 (6- to 8-ounce) boneless, skinless chicken breasts , trimmed; ¾ teaspoon table salt , divided; ¼ teaspoon pepper; 4 teaspoons extra-virgin olive oil , divided; 1½ pounds radishes , trimmed and halved lengthwise; ½ cup chicken broth; 3 tablespoons dukkah , divided; 2 ounces (2 cups) watercress