Cooking Lessons Vegetable Cookery and Preparation 1 — Questions and Answers
Question 1: What cooking method involves briefly submerging vegetables in boiling water, then immediately transferring them to ice water?
- Sautéing
- Blanching (Correct answer)
- Steaming
- Braising
Correct answer: Blanching
Blanching briefly boils vegetables then shocks them in ice water to stop cooking, preserve bright color, and set texture.
Question 2: Which aromatic vegetable is most commonly 'sweated' over medium-low heat to release moisture without browning?
- Carrots
- Onions (Correct answer)
- Broccoli
- Bell peppers
Correct answer: Onions
Onions are sweated over gentle heat to soften and release their moisture, becoming translucent without caramelizing.
Question 3: Which knife cut produces uniform cubes measuring 1/8 inch (3mm) on each side?
- Julienne
- Brunoise (Correct answer)
- Chiffonade
- Batonnet
Correct answer: Brunoise
Brunoise is the smallest standard dice cut in classical French cooking, producing precise 1/8-inch cubes used as garnishes and in fine preparations.
Question 4: Which cooking method best preserves water-soluble vitamins such as vitamin C and B vitamins in vegetables?
- Boiling
- Steaming (Correct answer)
- Pressure cooking
- Blanching
Correct answer: Steaming
Steaming keeps vegetables above the water rather than submerged in it, preventing water-soluble vitamins from leaching out into the cooking liquid.
Question 5: What causes green vegetables like broccoli to turn an olive drab color when overcooked?
- Acid exposure breaks down chlorophyll into pheophytin (Correct answer)
- Carotenoid pigment degradation
- The Maillard reaction
- Enzymatic browning at the cell surface
Correct answer: Acid exposure breaks down chlorophyll into pheophytin
Prolonged heat releases organic acids that displace the magnesium in chlorophyll, converting it to olive-colored pheophytin.
Question 6: What oven temperature range produces the best caramelization and browning when roasting vegetables?
- 250–300°F (120–150°C)
- 325–375°F (165–190°C)
- 400–450°F (205–230°C) (Correct answer)
- 475–525°F (245–275°C)
Correct answer: 400–450°F (205–230°C)
Roasting at 400–450°F provides enough heat to trigger caramelization and the Maillard reaction on the vegetable's exterior without burning.
Question 7: What is the best way to prevent cut potatoes from turning brown before cooking?
- Coat them lightly in vegetable oil
- Submerge them in cold water (Correct answer)
- Blanch briefly then cool
- Refrigerate uncovered immediately
Correct answer: Submerge them in cold water
Submerging cut potatoes in cold water limits oxygen exposure, preventing the enzymatic oxidation that causes surface browning.
