From The Modern Family Cookbook

1 No. 2 can peas
cold water
1 slice onion
1½ teaspoons sugar
1 teaspoon salt
2 cups thin white sauce

Drain liquid from peas, measure and add cold water to make 2 cups liquid. Return to peas; add onion, sugar and salt. Place over heat and simmer 5 minutes, then rub through a sieve or food mill. There should be 2½ cups pulp and liquid. Combine with hot white sauce and serve hot. Float 2 or 3 croutons on each portion just before serving. 5 servings.

MMM white sauce and canned pea soup!