Hidden Cauliflower Mac n' Cheese

Ingredients (for 2 servings)

• 1 lb — wheat macaroni
• 4 cup — water
• 2 tbsp — soy sauce
• 1 tbsp — spicy brown mustard
• 1.5 tsp — fine sea salt
• 1 lb — cauliflower florets
• 4 oz — extra-sharp cheddar cheese
• 1 cup — parmesan