Make this recipe a recipe that people in that category can eat. categories: ['low_sugar'], recipe: preheat oven to 350 degrees. saute onion in butter. beat egg yolks until thick and lemon-colored. stir into hot white sauce along with spinach and cheese. fold in egg whites beaten until stiff, not dry, peaks are formed; turn into greased 1 1/2 qt casserole. set in pan of hot water and bake about 50 minutes. white sauce: melt butter, stir in flour and heat until bubbly. gradually add milk or cream, stirring constantly; cook 1-2 minutes. season with salt and pepper. makes about 1 cup. serve immediately.

Target recipe: heat the oil and butter in a large saucepan and gently cook the onion for 3 minutes until softened. stir in the potatoes, spinach, stock, nutmeg and seasoning. bring to the boil and simmer for 15 minutes. transfer to a food processor (or use a hand-blender) and blend until smooth. return to the pan, heat through and adjust seasoning to taste. ladle into soup bowls and garnish with a swirl of creme fraiche (or cream) and freshly ground black pepper. enjoy!