Prepare the Stuffing: Cut toasted bread into thumb-sized pieces and add to a mixing bowl. Pour in vegetable broth gradually while mixing to ensure bread absorbs moisture but remains chunky.

Prepare the Roasts: In another bowl, combine dry roast ingredients. Pulse wet ingredients in a food processor until slightly chunky. Mix wet blend into dry ingredients and knead gently until you have a firm dough.

Shape the Roasts: Divide dough into equal portions, flatten slightly, add stuffing, fold dough over and shape into roasts. Set aside on a lined baking tray.

Prepare the Gravy: Whisk gravy ingredients together until smooth, add chopped mushrooms, and nestle roasts atop the gravy in the baking dish.

Bake: Cover baking dish with foil and preheat oven to 360°F (180°C). Bake for 30 minutes, then remove foil and bake for an additional 15 minutes until firm.