# Off-Menu Meatball Subs Potbelly Has New Underground Menu Offerings Just for National Meatball Day By Katherine Pendrill | Published 2023-03-12 | Lifestyle Source: Trend Hunter, https://www.trendhunter.com/trends/underground-menu References: [chewboom](https://www.chewboom.com/2023/03/08/potbelly-unveils-secret-menu-items-in-celebration-of-national-meatball-day/)  [Potbelly](https://www.trendhunter.com/trends/new-lucky-7-sandwich) is celebrating National Meatball Day in a big way this year with some delicious offerings from its Underground Menu. From March 9 through April 3, 2023, fans can access Potbelly's famous Underground Menu exclusively online and through the brand’s app. The menu features three toasty [meatball creations](https://www.trendhunter.com/trends/all-around-menu) and Potbelly is inviting its Perks Rewards members to try all three during the promotional timeframe for an added reward. The sandwiches featured as part of the promotion include the Sicilian, which is an Italian sandwich with meatballs, mushrooms, marinara sauce, and provolone cheese, and the Wrecking Ball sandwich, which is the brand's signature Wreck sandwich plus [meatballs, marinara sauce](https://www.trendhunter.com/trends/subway-meatier-shower-promotion), and provolone cheese. The last sandwich on the menu is the Fireball, which consists of meatballs, chili, cheddar cheese, and Potbelly’s signature hot peppers. Image Credit: Potbelly ## Trend Insights (Trend Hunter) - Score: 1.1/10 - Popularity: 8% | Activity: 11% | Freshness: 15% - Audience gender: 50% men, 50% women - Primary generations: Millennial, Gen X - Top markets: North America ## Categories [Trend Hunter](https://www.trendhunter.com/trends) > [Lifestyle](https://www.trendhunter.com/lifestyle) > [Food](https://www.trendhunter.com/food) ## Key Themes ### What's Driving This Trend - **Off-menu Offerings:** Opportunity for restaurants to offer exclusive menu items through online or app ordering. - **Promotional Timeframes:** Opportunity for companies to create limited-time promotions to generate buzz and increase customer engagement. - **Unique Sandwich Creations:** Opportunity for restaurants to create innovative sandwich creations using traditional menu items as a base. ### Who This Affects Most - **Fast Food:** Fast food chains can create off-menu items to entice customers and increase customer retention. - **QSR (quick Service Restaurant):** QSRs can create limited-time menu promotions to increase customer engagement and drive sales. - **Casual Dining:** Casual dining restaurants can create innovative sandwich creations to differentiate themselves from competitors and attract new customers. ## Related on Trend Hunter - [Secret Menu Italian Sandwiches](https://www.trendhunter.com/trends/new-lucky-7-sandwich.md) - [Savory Chicken Meatball Sandwiches](https://www.trendhunter.com/trends/chicken-parmesan-meatball-sub.md) - [Marinara Meatball Subs](https://www.trendhunter.com/trends/ultimate-meatball-sub.md) - [Mobile-Exclusive Ham Salads](https://www.trendhunter.com/trends/a-wreck-salad.md) - [Meaty Macaroni-Topped Sandwiches](https://www.trendhunter.com/trends/smokestack-pork-mac-sandwich.md) - [Complimentary Winter Soup Promotions](https://www.trendhunter.com/trends/potbelly-comfort-in-a-cup.md) - [Spicy Nacho-Inspired Sandwiches](https://www.trendhunter.com/trends/spicy-nacho-steak.md) - [Meatball-Stuffed Calzone Pizzas](https://www.trendhunter.com/trends/meatball-calzone.md) - [Plant-Powered Italian Subs](https://www.trendhunter.com/trends/plantbased-meatball-parmigiana.md)