Customers

Are there customers with real pain and money? 

Your own conviction that if you love the idea, everyone will love the solution, is necessary but not sufficient. 

Customers may “like” a product, but will generally only pay for things they “need,” physically or emotionally. 

Or maybe the people who really need the product don’t have any money. 

Talk to experts in this domain (chefs, home cooking fanatics), and listen for hidden requirements and challenges.