Exploring the Flavor of Nasturtium Leaves
Nasturtium leaves are known for their distinct peppery bite, which is a result of their mustard oils, similar to those found in arugula and watercress. The flavor can vary from plant to plant and is often stronger in older, more mature leaves. Young, tender leaves tend to have a milder sweetness before the peppery finish kicks in. This unique profile makes them a fantastic addition to both raw and cooked dishes.
Preparing Nasturtium Leaves for Cooking
Before incorporating nasturtium leaves into your cooking, proper preparation is key. First, ensure you are harvesting from a source that is free of pesticides or other chemicals. A thorough wash in cold water is necessary, as nasturtiums are known to be "trap crops" for aphids. After washing, pat the leaves dry with a towel or use a salad spinner. The leaves can be used whole, torn, or chopped, depending on your recipe. For dishes like pesto, tear the leaves to help them break down more easily in the food processor.
Versatile Nasturtium Leaves in the Kitchen
Pesto and Sauces
One of the most popular uses for nasturtium leaves is a zesty pesto. The peppery taste adds an exciting twist to the classic Italian sauce.
- Nasturtium Pesto: Use nasturtium leaves in place of or in combination with basil. A simple recipe includes blending packed leaves with garlic, toasted walnuts or pine nuts, Parmesan cheese, and a high-quality olive oil. This pesto is excellent tossed with pasta, spread on sandwiches, or drizzled over baked potatoes.
- Compound Butter: Finely chop nasturtium leaves and mix them into softened butter along with a pinch of salt. This peppery butter is perfect for topping grilled fish, corn on the cob, or simply spreading on toast.
Salads and Wraps
Nasturtium leaves bring a beautiful visual element and a spicy kick to fresh salads and wraps.
- Mixed Green Salad: Combine nasturtium leaves with milder greens like butter lettuce or baby spinach to balance the peppery flavor. Add complementary ingredients like goat cheese, fresh berries, or toasted nuts for a sophisticated and flavorful salad.
- Leafy Wraps: Use large nasturtium leaves as edible wrappers for savory fillings, much like Greek dolmades. Fill them with a mixture of cooked rice, vegetables, and ground meat or vegetarian alternatives for a unique appetizer or light meal.
Soups and Stir-Fries
Cooking nasturtium leaves mellows their peppery flavor, making them a great substitute for spinach or other greens in warm dishes.
- Nasturtium Soup: Sauté nasturtium leaves and flowers with onions, celery, and potatoes before adding vegetable stock and simmering. A quick blend with a stick blender creates a peppery and vibrant green soup, delicious served hot or cold.
- Stir-Fry Addition: Toss chopped nasturtium leaves and stems into a stir-fry towards the end of cooking. Their texture will soften slightly, and their flavor will infuse the dish with a nice peppery note.
Infusions and Garnishes
Beyond main dishes, nasturtium leaves can be used for infusions or simple decorations.
- Nasturtium Vinegar: Infuse white wine or cider vinegar with a jar full of nasturtium leaves and flowers for a peppery, brightly colored vinaigrette. Store it for a few weeks, shaking occasionally, before straining and using in dressings.
- Garnish: Both the leaves and flowers make beautiful and edible garnishes for a wide variety of dishes, including soups, appetizers, and plates of pasta.
Comparison of Nasturtium vs. Traditional Greens
| Feature | Nasturtium Leaves | Arugula | Spinach | 
|---|---|---|---|
| Flavor Profile | Peppery, spicy, slightly sweet. | Peppery, nutty, with a slight bitterness. | Mild, earthy, and often sweet when cooked. | 
| Texture | Firm and crisp when raw, softens when cooked. | Tender and soft, more delicate than nasturtium. | Very tender and wilts quickly when cooked. | 
| Culinary Uses | Pesto, salads, wraps, soups, stir-fries. | Salads, sandwiches, pizza toppings. | Salads, sautéing, dips, smoothies. | 
| Nutritional Value | High in vitamin C, iron, and antioxidants. | Good source of vitamins K, A, and C, as well as folate. | Excellent source of iron, vitamin K, and folate. | 
Conclusion
From a zesty pesto to a peppery addition to salads and soups, what you can make with nasturtium leaves is only limited by your imagination. Their versatility, unique flavor, and nutritional benefits make them a valuable and easy-to-grow addition to any kitchen or garden. By experimenting with these edible greens, you can add a new dimension of flavor and color to your culinary repertoire. Whether you choose to use them raw in a fresh salad or cooked in a hearty soup, nasturtium leaves offer a simple way to elevate your everyday cooking.
- For more information on the health benefits and culinary uses of nasturtiums, consult the resource from the Institute of Culinary Education at ice.edu/blog/nasturtium-seeds-nasturtium-leaves.
Note: Always ensure that any edible plant harvested is grown without chemical pesticides. Harvest from clean areas and wash thoroughly before consumption.