VEGETABLES

Course Overview

  • Course Name: Fundamentals of Food Preparation

  • Course Code: FBEV1201

  • Credits: 6

  • Duration: 9

  • Unit: 4 - Vegetables and Fruits, Salads and Salad Dressings

  • Lesson: 1 of 3

Definitions of Vegetables

  • Vegetables: Edible plants or parts of plants.

  • Botanical Definition: Includes nuts, fruits, and cereal grains.

    • Example: Fruits like apples and watermelons can be classified as vegetables botanically.

  • Culinary Definition: Non-sweet plants served raw or cooked as main meal components, e.g., peas, potatoes. Exceptions include sweet potatoes.

Plant Parts Used as Vegetables

Leaves

  • Examples:

    • Cabbage

    • Brussels sprouts

    • Spinach

    • Kale

    • Swiss chard

Seeds

  • Various beans, peas, lentils, and corn.

Tubers

  • Examples:

    • Potatoes

    • Yam

    • Cassava

Roots

  • Examples:

    • Carrots

    • Beets

    • Radishes

Bulbs

  • Examples:

    • Garlic

    • Onions

    • Shallots

Fruits

  • Examples:

    • Cucumbers

    • Eggplants

    • Pumpkins

Stems and Shoots

  • Examples:

    • Asparagus

    • Celery

Flowers

  • Examples:

    • Artichokes

    • Broccoli

Nutritional Content of Vegetables

  • Mostly >80% water

  • Composition: Carbohydrates, minimal fat and protein

  • Indigestible fiber is prevalent.

  • Excellent source of vitamins and minerals.

Changes During Cooking

Effects of Cooking

  • Changes observed in:

    • Texture

    • Flavor

    • Color

    • Nutrients

Texture

  • Importance: Cooking primarily aims to alter texture.

  • Fiber Structure: Composed of cellulose and pectin; heat softens these components.

  • Fiber varies across vegetables (e.g., spinach vs. carrots).

Tips for Texture Control

  • Acids (e.g., lemon juice) can extend cooking time.

  • Sugars strengthen structure.

  • Heat: Longer cooking leads to softer vegetables.

    • Avoid alkalis like baking soda in green vegetables to prevent mushiness and nutrient loss.

Flavor Changes

  1. Flavor Loss: Occurs through evaporation/leaching.

  2. Cooking Aids: Shorter cooking times and boiling salted water reduce loss.

  3. Strong Flavors: Some vegetables (e.g., from the onion or cabbage family) benefit from partial flavor loss during cooking.

Color Changes

  • Natural colors are critical for visual appeal in dishes.

  • Different pigments react variably to heat and acids.

  • White (flavones): Remain white in acid, turn yellow in alkali.

  • Red (anthocyanins): Bright red in acid, blue in alkali.

Nutrient Retention

  • Vegetables offer vitamins A and C and other nutrients.

  • Nutrient loss factors:

    • High temperature

    • Long cooking times

    • Leaching

    • Alkalis

General Guidelines for Cooking Vegetables

  • Avoid overcooking;

  • Cook close to service time;

  • For advance cooking, undercook and chill quickly;

  • Cut vegetables into uniform sizes for even cooking;

  • Do not mix batches of different doneness levels.

Quality Standards in Cooked Vegetables

Color

  • Fresh, bright colors; especially for green vegetables.

Appearance

  • Neatly cut and arranged without excess water.

Texture

  • Properly cooked: Crisp-tender, not mushy or tough.

Flavor

  • Natural, fresh flavors; minimal off-flavors or bitterness.

Seasonings & Sauces

  • Lightly seasoned sauces that enhance, not overpower.

Vegetable Combinations

  • Attractive combinations in flavors, colors, and shapes.

  • Combine cooked vegetables at the last minute to avoid discoloration.

Handling Vegetables

Washing

  • Thoroughly wash fresh produce.

  • Root vegetables (e.g., potatoes) need scrubbing; leafy greens require rinsing multiple times.

Soaking

  • Avoid long soaking times to retain flavors/nutrients;

  • Dried legumes should be soaked before cooking.

Peeling and Cutting

  • Peel thinly; cut vegetables close to cooking time.

Storage

Fresh Vegetables

  • Store in cool, dry places; cover to prevent drying.

Frozen Vegetables

  • Store at -18°C or lower; do not refreeze.

Canned Vegetables

  • Keep in cool, dry places; discard damaged cans.

Leftovers

  • Best to minimize leftovers; store quickly after cooling.

Cooking Methods

Boiling

  • Minimal water usage to maintain nutrients and flavor.

Baking

  • Suitable for high moisture vegetables; maximum nutrient retention when skin is intact.

Steaming

  • Retains water-soluble nutrients; cook until fork-tender.

Stir-Frying

  • Quick method; retains nutrients, color, and texture.

Frying

  • Quick method that may increase calories due to oil retention.

Microwave Cooking

  • Quick and nutrient-preserving; utilize minimal water.