Boiling or steaming frozen vegetables often results in a soggy, bland side dish, but roasting them in olive oil produces a crisp, golden result. The method allows excess water to evaporate quickly, helping the vegetables cook evenly and develop a caramelised finish.
Why Boiling Lets Vegetables Down
Vegetables release a considerable amount of water as they defrost, so steaming or submerging them in boiling water leaves them limp and unappetising. This can also cause much of their natural sweetness to be lost, resulting in a side dish that is disappointing in both flavour and texture.
Roasting in olive oil allows excess water to evaporate swiftly, ensuring the vegetables cook more evenly and develop a lovely golden colour. This process caramelises the natural sugars, leaving them delightfully crispy and perfectly browned. Olive oil also imparts a rich depth of flavour, helps retain natural sweetness, and allows seasoning to adhere while cooking.
Nutritional Benefits of Roasting
Since many of the nutrients in vegetables are water-soluble, they are often lost during boiling or steaming. Using olive oil helps the vegetables retain their nutritional value while drying out swiftly, resulting in a far superior taste that transforms them into a side dish worth enjoying.
Roasting frozen vegetables requires just five to 10 minutes of preparation, with no need to monitor them constantly, making it every bit as straightforward as boiling or steaming.
How to Make Tastier Frozen Vegetables
To prepare the dish, you will need one bag of frozen vegetables (around 500g), two tablespoons of olive oil, one teaspoon of garlic powder, one teaspoon of smoked paprika, and salt and pepper.
Preheat the oven to 220°C and place a tray inside to heat up for five to 10 minutes. A hot tray encourages moisture to evaporate rapidly, helping the vegetables crisp up, whereas a cold tray leaves them sitting in their own water for too long.
While the tray heats, place the frozen vegetables in a large bowl and add the garlic powder, smoked paprika, salt and pepper. Drizzle the olive oil over the vegetables and gently toss with a large spoon until everything is thoroughly coated.
Alternatively, season the vegetables directly on the hot tray to use fewer dishes, but exercise extreme caution to avoid burns and work swiftly to prevent the tray from losing heat. Once the tray is sufficiently hot, use oven mitts to remove it and arrange the vegetables in a single layer, ensuring gaps between larger pieces and avoiding piling them on top of one another.
Place the tray in the oven and roast for 20 minutes. After this time, turn the vegetables over and continue cooking for a further 10 to 15 minutes. This method takes slightly longer than boiling or steaming, but the end result is worth the extra time, yielding perfectly crisp and flavoursome vegetables.
Once cooked, remove the vegetables from the oven, where they should appear beautifully caramelised. For an additional burst of flavour, finish them with a sprinkle of parmesan cheese, a squeeze of lemon juice or a pinch of chilli flakes.
