Herbed Cheese and California Avocado Flatbread

Name: Herbed Cheese and California Avocado Flatbread
Ingredients: 1 pound store-bought or homemade pizza dough , thawed if frozen; 1 (5 to 6.5-ounce) package soft garlic and herb cheese; All-purpose flour, for dusting; 1 tablespoon olive oil; 1/2 teaspoon kosher salt; 2 medium red radishes; 4 to 5 sprigs fresh dill; 1/2 medium lemon; 1 ripe, but firm large fresh California Avocado (6 to 8 ounces); 1/2 small red onion; 1/2 cup rice, distilled white, or apple cider vinegar; 1 teaspoon kosher salt; 1 teaspoon granulated sugar