Add the 4 cups of vegetable broth, and then turn heat down to medium heat. Add the peas, herbs and all the mushrooms in the pot and continue cooking on medium-low heat for another 5 minutes, stirring occasionally.
Divide mixture into oven-proof bowls. Top the mixture with your chosen topping. (see note). Here we are using the potato that is thinly sliced. Place the thin slices on top of the vegetable mixture. Cook in the oven for 15 minutes.
Notes
Toppings can include puff pastry, pie pastry, thinly sliced white potatoes, thinly sliced sweet potatoes, thinly sliced carrots and even brussel sprout leaves (steam individual leaves first before layering on top of pie).