This vegetarian version of the classic recipe substitutes white beans for the tuna and lemon zest for the anchovies. Some beans are smashed so that they will cling to other ingredients, including a bed of spinach.
Rhubarb chard, named for its brilliant red ribs, is delicious sauteed in a little olive oil and served on the side, but if you like, toss the sauteed greens into the pasta. Swiss chard, kale, dandelion greens, or sorrel can be substituted for the rhubarb chard.
Spinach souffle is lightened with a bechamel sauce made with skim milk, bound with egg yolks, and given volume with beaten egg whites; it is airy when served right away and similar to a quiche when cooled.