White Miso Ramen with Tofu and Asparagus

Name: White Miso Ramen with Tofu and Asparagus
Cuisine: Asian, Japanese
Ingredients: 4 tbsp dried shitake mushrooms; 1 onion; 6 cloves garlic; 2cm fresh ginger; 6 tbsp white miso; 1 tbsp tahini; 2 tbsp rapeseed oil; 3 tbsp soy sauce; 1 litre soy milk; 250g ramen noodles; 250g fine asparagus; 100g frozen edamame beans; 0.5 tsp chili flakes; 0.5 lemon; 280g firm tofu