5-Minute Broccoli Soup

1 (10 oz) Box frozen chopped broccoli
1 1/2 Tablespoons margarine
3 Tablespoons onion, finely chopped
2 Tablespoons flour
2 1/2 Cups milk
1 Teaspoon salt
1 Cup cheddar cheese
1 Tablespoon flour
1 Pinch cayenne pepper to taste
1/8 Teaspoon nutmeg

Cook broccoli according to package directions, but omit salt and add onion. In a large saucepan over medium high heat, melt margarine and cook 1 minute. Add the 2 tablespoons flour, whisk 1 minute. Slowly whisk in milk and salt until smooth and boiling. Add broccoli and grated cheese (recommended white cheddar) and continue to whisk. Bring to a boil, season with cayenne and nutmeg if desired.