Prawn tempura udon noodle soup

Ingredients

• 200 g udon
• 2 prawn tempura
• 1 boiled egg
• 2 tsp dashi granules
• 1 tbs soy sauce
• 1 tbs mirin
• 400 ml hot water
• ¼ cup chopped green onions
• Shichimi Togarashi