Mel's Brown Pizza Sauce

Ingredients

• 4 onions , roughly chopped, or more to taste
• 3 stalks celery , roughly chopped
• 1 cup sliced fresh mushrooms
• 5 tablespoons minced garlic
• 3 cartonss chicken broth , 900 ml
• 3 cans tomato paste , 12 ounce
• 0.5 cups dried oregano
• 0.25 cups ground black pepper , or more to taste
• 0.25 cups white sugar
• 3 tablespoons celery salt
• 2 teaspoons dried basil
• 2 teaspoons onion powder
• 2 teaspoons seasoned salt
• 1.5 cups vegetable oil
• 0.5 cups all-purpose flour

Instructions

1. 1

   Combine about 1/4 each onions, celery, mushrooms, and garlic with 1/4 cup chicken broth in the bowl of a food processor; pulse until smooth, adding more chicken broth as necessary. Transfer puréed vegetable mixture to a large pot. Repeat with remaining onions, celery, mushrooms, and garlic.

2. 2

   Stir remaining chicken broth into vegetable purée in the pot; bring to a boil, reduce heat to low, and simmer until flavors blend, about 45 minutes.

3. 3

   Stir tomato paste, oregano, black pepper, sugar, celery salt, basil, onion powder, and seasoned salt into vegetable purée-broth mixture; bring to a boil, reduce heat to low, and simmer until flavors blend, about 45 minutes more.

4. 4

   Whisk oil and flour into sauce until smooth.