Which of the following is an appetizer offered on the menu?

The Cactus Blossom is indeed an appetizer featured on the Texas Roadhouse menu. This dish consists of a large, battered and deep-fried onion that is served with a zesty dipping sauce. It's known for its crispy texture and bold flavor, making it a popular starter for guests looking to enjoy a shareable dish before their main course.

In contrast, garlic bread, spring rolls, and bruschetta are not part of the Texas Roadhouse appetizer selection. Garlic bread is typically associated with Italian cuisine; spring rolls are a staple in Asian dishes; and bruschetta, which often features toasted bread topped with various ingredients, is commonly found in Italian eateries. Thus, while these items may be popular appetizers in other dining contexts, they do not appear on the Texas Roadhouse To-Go menu. This distinction highlights the unique offerings of the Texas Roadhouse dining experience, particularly the Southwestern-themed flavors evident in their appetizers.