A resurgence of excitement or interest in something is a renaissance. My sister is hoping for a renaissance of disco — she's been practicing her dance moves!
If, after avoiding carbohydrates for years, people start enthusiastically eating them again, you can describe this as a bread and pasta renaissance. It's a renewal or revival of interest in something temporarily out of favor. Another kind of renaissance is specific to art, literature, and culture, like the capital-R Renaissance in 15th- and 16th-century Europe or the Harlem Renaissance in the 1920s.