Harissa, a renowned hot sauce originating from Tunisia, holds a significant place in Tunisian cuisine, cherished for its distinctive flavor and cultural symbolism. Its recent inscription on the Representative List of the Intangible Cultural Heritage of Humanity marks a pivotal moment, poised to catalyze creative energies. This recognition invites culinary professionals, artists, media, and the public to reimagine Harissa through lenses of creativity and innovation, fostering its reinterpretation and dissemination. The “Souk El Felfel” initiative in Nabeul is integral to this narrative, revitalizing and repurposing the city's historic pepper market into a vibrant hub for culinary arts, local produce, and artisanal craftsmanship. By celebrating local heritage, supporting artisans and producers, and enhancing tourism, this project safeguards ancestral traditions while promoting economic growth within the region. These efforts not only preserve culinary and craft traditions but also serve as a catalyst for sustainable development, bolstering community resilience and safeguarding intangible cultural heritage for future generations. This study aims to explore the strategic role of design in preserving, promoting, and enriching intangible heritage associated with Harissa, examining how the “Souk El Felfel” project exemplifies these principles. Through this lens, we seek to elucidate pathways for revitalization, community engagement, and sustainable development, ensuring the enduring legacy of cultural practices and social traditions linked to Harissa and beyond.