what's your favorite cooked spinach recipe?

dodecadragon sent me an interesting table of information from the USDA website on spinach and lamb's quarter nutrition.  Where values were available for both plants, lamb's quarter (related to quinoa) beat spinach for best value in a majority of the vitamin and mineral categories.

The trouble when searching for recipes or nutritional value of quinoa, however, is that it's most commonly grown for its seed rather than its leaves.  It seems the best solution is just to substitute quinoa leaves for whatever recipe calls for spinach leaves.

Recipes that involve heat might be best.  When I used the leaves in a salad, they were a bit on the chewy side because of their thickness.  Cooking would wilt them enough to eliminate that problem.

So... what's your favorite spinach recipe?  I don't cook with spinach, so I'm not familiar with options for what to do with these quinoa (or lamb's quarter) leaves.