Rehydrate the soy curls: In a large bowl, add the dehydrated soy curls, then cover with 3 cups of warm vegetable broth. Let them rehydrate for about 10 minutes, until they have grown in size and softened. Drain and squeeze any excess liquid from the curls and set aside.
Cook the peppers and onions: Warm the oil in a large nonstick or cast-iron pan over medium-high heat, then sauté the onions until translucent, about 5 minutes. Now add the green peppers and cook for 2-3 minutes, until they soften a bit. Remove from the pan and set on a plate nearby.
Cook the mushrooms and soy curls: Add a little more olive oil to the pan, then pan fry the mushrooms and soy curls until the mushrooms have softened and the soy curls begin to brown, about 10 minutes. To the pan, add the garlic powder, onion powder, paprika, black pepper, soy sauce, Worcestershire sauce and optional kitchen bouquet. Continue to pan fry for another 5 minutes. Lastly, add the peppers and onions back to the pan and stir into the soy curl/mushroom mixture. Remove from heat.
Make the cheese sauce: In a small saucepan, melt the vegan butter over medium heat. Now add the unsweetened almond milk and vegan cheese. Whisk until the cheese melts and you have a smooth cheese sauce.
Toast the hoagies (optional): Preheat the oven to 350 degrees F and place the hoagie rolls on a baking sheet. Spread the softened vegan butter inside the rolls, and toast for 3-4 minutes until warm and slightly golden brown.
Assemble: Fill each toasted hoagie with the soy curl/veggie mixture and top with vegan cheese sauce. Serve immediately.