Preheat the oven to 350º. Spray a loaf pan or 8x8 square baking pan with nonstick spray and set aside (an 8x8 pan makes a crisper loaf).
Grind the into a coarse meal using a food processor or spice/coffee grinder. Place in a large mixing bowl and set aside.
Sauté any vegetables you've chosen in the water or broth for steam-frying until soft. Add to the large mixing bowl along with all the remaining ingredients. Mix and mash together well, adding only as much liquid as needed to create a soft, moist loaf that holds together and is not runny (you may not need to add any liquid if the grains and protein are very moist). Add more binder/carbohydrate as needed if the loaf seems too wet.
Press mixture into the prepared pan and bake for 45 minutes to 1 hour, or until cooked through.
Let the loaf cool in the pan for 10 to 15 minutes, then turn out onto a plate or platter and slice. Serve with potatoes, vegetables, and vegetarian gravy, if desired.
Cold leftover slices of make a great sandwich filling.