Maple Mustard Vegan Wings

Name: Maple Mustard Vegan Wings
Cuisine: American
Ingredients: 300 g oyster mushrooms; vegetable oil (for deep frying); 128 g (1 cup) all-purpose flour; 315 mL (1 1/3 cup) vegetable stock; 60 g (1/4 cup) vegan yogurt; 1/2 tsp pepper; 1/2 tsp salt; 192 g (1 1/2 cups) all-purpose flour; 1 tsp onion; 1 tsp garlic; 1/2 tsp mustard powder; pinch salt & pepper; 60 mL (1/4 cup) butter (melted); 60 mL (1/4 cup) maple syrup; 62 g (1/4 cup) yellow mustard; 1/2 tsp cayenne powder; 15 mL (1 tbsp) soy sauce