Blend silken tofu, olive oil, water, and bouillon cube until smooth and creamy.
Combine vital wheat gluten, smoked paprika, poultry seasoning, nutritional yeast, garlic powder, salt, and pepper in a bowl.
Add the tofu mixture and, mix with a spatula, then knead by hand until a dough ball forms (about 1 minute).
Divide the dough into 4 pieces.
Roll each piece into fillets (5-6 inches long and 4 inches wide).
Layer vegan cheese and ham slices on one fillet, repeating for three layers.
Top with another fillet and seal edges with damp fingers.
Mix vegan mayo and Dijon mustard, then brush over the fillets.
Coat with breadcrumbs, pressing gently to adhere.
Heat vegetable oil in a skillet.
Fry fillets for 3-4 minutes per side until golden.
Bake fillets at 375°F (190°C) for 15 minutes, flipping after 10 minutes.