Vegan Portobello Philly Reuben - The Wild Vegans

Ingredients

• 1/3 cup vegan mayonnaise (soy-free if necessary)
• 1 tbsp. ketchup
• 1 tbsp. no-salt-added tomato paste
• 2 tsp. red wine vinegar
• 1 tsp. dried dill
• 1/2 tsp. smoked paprika
• 2 to 3 tbsp. sweet pickle relish
• 4 portobello mushroom caps (or 1/2 lb white button mushrooms sliced)
• Olive oil spray
• 2 tbsp. liquid aminos (or gluten-free tamari; use coconut aminos to be soy-free)
• 2 tbsp. vegan Worcestershire sauce (gluten-free and/or soy-free if necessary)
• Black pepper to taste
• 4 vegan sandwich rolls (gluten-free if necessary), split horizontally
• Smoked Gouda Cheese Sauce , Melty Variation or vegan cheese slices
• Loads of sauerkraut