Levi Roots's sauce brand that received investment on the British programme Dragon's Den was Reggae Reggae Sauce.
Levi Roots, the stage name of Keith Valentine Graham, appeared on Dragon's Den in 2007 to pitch his jerk barbecue sauce. The product was presented in a distinctive reggae-themed style and became one of the programme's best-known success stories.
Peter Jones and Richard Farleigh agreed to invest in the business in the televised pitch. The brand later expanded beyond its original sauce into a wider range of Caribbean-inspired food products, helping Roots build a substantial food business and public profile.
The name is sometimes shortened casually to “Reggae Sauce,” but the canonical brand name is Reggae Reggae Sauce. It should also not be confused with jerk seasoning in general: the answer refers to Roots's specific commercial brand.