Smoky Caesar Salad

Name: Smoky Caesar Salad
Ingredients: 4 cups 3/4-inch-cubed sourdough bread (about 6 1/2 ounces); 1/2 cup olive oil, divided; 4 medium garlic cloves, smashed, divided; 1 1/2 teaspoons kosher salt, divided; 3/4 teaspoon black pepper, divided; 1 (3.9-ounce) can boneless, skinless smoked trout fillets in canola oil, undrained; 3/4 ounce Parmesan cheese, grated on a Microplane grater (about 1/2 cup), divided; 1 large pasteurized egg yolk; 3 tablespoons lemon juice (from 2 lemons); 2 teaspoons drained capers; 1 1/2 teaspoons Dijon mustard; 1/2 teaspoon Worcestershire sauce; 2 medium romaine lettuce hearts, cut into 1-inch-wide strips (about 8 cups); 1 medium head radicchio, cored and cut into 1/2-inch-wide strips (about 4 cups)