Cut focaccia loaf in half horizontally; place cut sides up on a baking sheet.
Combine caesar dressing and roasted red peppers in a food processor; process until smooth.
Drizzle 1/2 cup red pepper dressing evenly over cut sides of bread. Sprinkle with goat cheese and nuts. Bake for 6 to 8 minutes or until lightly brown.
Remove meat from chicken and coarsely chop. Sprinkle chicken over bottom half of bread. Top with salad greens, tomatoes and remaining dressing; cover with top half of bread.