Sauté the shallots and fennel until they begin to soften but not brown.
Add garlic, corn, thyme and oregano and continue cooking on medium low heat for a couple of minutes more until the garlic is fragrant.
Add the clam juice, any liquid drained from the clam strips, and the wine. Turn the heat up in the pan to reduce the liquid to about 1 cup.
Add the greens, turn the heat down to low, and cover the pan. Depending on the age of the Amaranth greens and the size of the leaves you used, the Amaranth may take 8-15 minutes to cook. Taste a bit of the greens every so often to determine when they are just tender.
Just before they are done to your liking put in the lemon zest and add salt and pepper to taste. Finish cooking the greens.
At the very end, add the clam strips and the pasta and cook for a couple of minutes stirring continuously. This will help get the clams cooked and the starch on the pasta become incorporated into the remaining reduction of clam juice and wine. (Note: the clams will cook at this last stage without getting overcooked and rubbery)
Note: I like good Parmesano Reggiano with this clam sauce. Some think cheese with seafood is a no-no but it really is a matter of taste. Sometimes I use escarole rather than Amaranth, especially during the winter when I don’t have Amaranth in the garden and am out of frozen Amaranth. Escarole, available in most grocery stores, is a little milder in flavor than Amaranth (especially Amaranth from late in the season). When using escarole or spinach, I don’t have to cook the greens very long and I sometimes skip the lemon zest.