Add flour, salt, baking powder and chopped herbs to a large mixing bowl. Mix together with a whisk.
3 Cups All Purpose Flour, 1 teaspoon Baking Powder, 2 teaspoons Salt, ½ Cup Chopped Fresh Herbs
Add the shortening and rub into the flour mixture with your fingers until the mixture resembles breadcrumbs.
¾ Cup Vegetable Shortening
Add the milk and stir together with a spoon.
1 Cup Whole Milk
Take ⅓ of this dough and place on a well floured piece of parchment paper. Using a rolling pin that has been rubbed down with flour roll out the dumpling dough until it's about ⅛" thick.
Using a pizza wheel cut the dough into 1 inch to 1-½ inch squares. Lay this piece of parchment on a baking sheet.
Repeat the above steps twice more, each time laying each layer on top of the other. Then place this baking sheet into the refrigerator covered with plastic wrap.
Add the butter to a large Dutch Oven pot, or a heavy bottomed pot. Melt over medium-high heat.
4 Tablespoons Unsalted Butter
Add the diced onions, carrots, celery and mushrooms and cook for about 5 minutes.
1 Each Sweet Onion, 2 Ribs Celery, 1 Cup Carrots, 1 Cup Mushrooms
Sprinkle the flour over the veggies and cook for another 3 minutes.
3 Tablespoons All Purpose Flour
Slowly pour in the chicken broth while stirring, and add the rosemary stalk.
10 Cups Chicken Broth, 1 Stalk Fresh Rosemary
Bring to a boil.
Add the refrigerated dumplings, a layer at a time, then gently push down and stir a little, until all have been added.
Bring to a boil, then cover and turn down to a simmer.
Allow to simmer for 30 minutes, stirring gently half way. Remove the rosemary stalk.
Add the chopped chicken, peas, salt and pepper and gently stir again. Turn off the heat and cover again. Allow to sit for 20 minutes again.
1 Each Rotisserie Chicken, 1 Cup Frozen Peas, 1 teaspoon Salt, ½ teaspoon Black Pepper