Use 1 tablespoon of onion powder as a substitute for 4 teaspoons of minced onion.
To reconstitute for 1 can: combine 1/3 cup of this dry mix with 1 cup of broth (water, chicken, beef, or vegetable broth) and 1/2 cup of optional inclusions like dehydrated mushrooms or canned chicken, then whisk in a saucepan until thickened.