Savory Vegan Philly Cheesesteak with Homemade Cheese Sauce - Taste Like Magic

Ingredients

• 454g seitan 'beef' (store-bought or homemade)
• 20ml oil, divided
• 1 medium onion, sliced
• ½ medium green bell pepper, sliced (optional)
• 118ml vegetable stock or vegan beef base
• 237ml unsweetened soy milk
• 30g potato or tapioca starch
• 16g nutritional yeast
• 5ml vegan lactic acid or 10ml lemon juice
• 5g dijon mustard
• 1 clove garlic or 5g garlic powder
• 5g paprika
• 1 shallot or ¼ onion or 5g onion powder
• 2g salt, or to taste
• 2ml maple syrup
• 15ml olive oil (optional for creaminess)
• 2 hoagie rolls
• 30g vegan butter