The document proposes making changes to a restaurant's best-selling burger to make it healthier by reducing calories, fat, and carbohydrates. It analyzes the nutrition of the current bun and cheese and identifies alternative components that would reduce calories from 260 to 140 for the bun and from 125 to 70 for the cheese. Implementing these changes would result in the new burger having total calories of 410 and total fat of 19g compared to 585 calories and 27g of fat for the original burger.