Whisk first 6 ingredients and minced garlic in a bowl. Season to taste.

Grill chicken, romaine, and bread (in batches) on lightly oiled grill over medium heat, turning, until bread is toasted and romaine is well marked, about 3 minutes, and chicken is cooked through, about 12 minutes. Rub bread with halved garlic clove and tear into pieces. Slice chicken.

Cook pasta per package directions. Drain and toss in bowl with chicken, romaine, radicchio, and dressing. Top with bread. Season.

357 cal, 26 g pro, 41 g carb, 3 g fiber, 9.5 g fat, 2 g sat fat, 360 mg sodium