Preheat oven to 350F. Coat a 13-by-9-inch baking dish with cooking spray.
To prepare the spinach nests, combine eggs, flour and cottage cheese; whisk well. Add spinach, salt and pepper; stir well. (This can be done up to 2 days ahead). Press mixture into prepared dish. Make 8 indentations with the back of a spoon (this is where the eggs will later be placed). Bake 25 minutes.
Remove from oven and using a spoon, hollow the nests out even more deeply. Break an egg into each indentation. Bake 15 minutes or until whites are set. Sprinkle with cheese. Bake 1 minute.
Place 1 egg and spinach nest on English muffin half. Garnish with slivered red pepper and onion, if desired.
Passover variation: Substitute 1/2 cup matzo meal for flour in the spinach nests. Substitute brown rice, cooked barley or potato pancakes for the English muffins.
Recipe by Crescent Dragonwagon, Relish the Holiday, April 2007.