Nutrition, Quality and Menu Development
This domain joins nutrition science with the quality and commercial logic of menus. It tests energy calculations, diet suitability, quality assurance, and whether a menu is balanced for the customer and viable for the kitchen.
Nutrition essentials
- Energy: protein 4 kcal/g, carbohydrate 4 kcal/g, fat 9 kcal/g; 1 kcal = 4.184 kJ.
- A balanced diet supplies energy, protein, fat, vitamins, minerals, fibre and water in proportion.
- Common allergens to declare: milk, eggs, fish, crustaceans, peanuts, tree nuts, soy, cereals containing gluten, sesame.
- Special diets to plan for include diabetic, low-sodium, renal, vegetarian, allergen-free, halal or kosher, and texture-modified.
- Cooking loses nutrients: water-soluble vitamins leach into cooking water, and vitamin C and thiamine are heat-sensitive, so short cooking with minimal liquid preserves more.
Quality and menu development
- Quality attributes a guest judges: appearance, texture, flavour, aroma, temperature, portion size and hygiene.
- Quality assurance is preventive and process-based; quality control is inspection of the finished item.
- Menu balance covers colour, texture, cooking method, cost, seasonality and nutritional spread.
- Menu engineering classifies items by popularity and contribution margin into stars, plough horses, puzzles and dogs.
Worked example
A dish contains 25 g protein, 40 g carbohydrate and 15 g fat. Energy = (25 × 4) + (40 × 4) + (15 × 9) = 100 + 160 + 135 = 395 kcal, which is 395 × 4.184 ≈ 1653 kJ. The reasoning shows that fat contributes the most energy per gram, so portioning fat is the fastest lever on the energy value of a plate.
Traps that cost marks
- Reporting kilojoules as kilocalories.
- Judging a menu item only by popularity, ignoring its contribution margin.
- Designing a menu with five fried items and no light option.
- Forgetting that allergen information must follow the dish, not the menu heading.