Notes: To cut cucumber sticks, slice cucumber into 1/8-inch-thick rounds, stack rounds, and cut into 1/4-inch-wide pieces. Rinse and drain calendula or marigold flowers, then pull off petals.
Cook pasta in about 3 quarts boiling water over high heat until tender to bite, about 10 minutes. Drain, immerse in cold water, and drain when cool, about 3 minutes.
In large bowl, mix lemon juice, oil, and pepper. Add pasta, feta, and cucumber. Mix and season to taste with salt. Add calendula petals and nasturtium blossoms; mix gently.
Line a platter or plates with nasturtium leaves. Spoon salad onto leaves.
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