Food Preparation and Cooking Methods
This section covers the principles of food preparation and the main cooking methods. The exam tests method classification, the effect of heat on food, suitable methods for particular commodities and safety points.
Method families
- Moist-heat methods: boiling, simmering, poaching, steaming and stewing. Heat is transferred by water or steam; methods suit tender foods, pulses and foods that need softening.
- Dry-heat methods: grilling, roasting, baking and frying. Heat is transferred by air, radiation or hot fat; methods brown and crisp surfaces.
- Combination methods: braising and pot-roasting, where food is first browned then cooked with moisture.
- Microwave cooking uses electromagnetic waves to heat water molecules; it is fast but does not brown reliably.
Effects and controls
Heat coagulates protein, gelatinises starch, softens connective tissue and destroys some vitamins, especially water-soluble ones. Use the minimum water and cooking time that still makes food safe. Control frying temperature to avoid burning outside and raw inside. Rest roasted meat before carving.
Worked example
A caterer has tough beef for stew and delicate fish fillets. Which methods suit each? Tough beef needs moist heat, such as stewing or braising, because slow, gentle cooking converts collagen into gelatine and tenderises the meat. Delicate fish needs poaching, steaming or gentle shallow-frying because high heat and long cooking make it break up and dry. Grilling the beef without moisture would toughen it further; boiling the fish hard would fragment it. The choice depends on connective tissue and delicacy, not on habit.
Traps that cost marks
Do not call grilling a moist method. Do not confuse stewing with braising; braising usually starts with browning and uses less liquid. Do not say frying is always unhealthy; method, temperature and oil quality matter. Do not overcook vegetables and discard all the water if vitamins are to be conserved.