Cauliflower Mac and Cheese

Name: Cauliflower Mac and Cheese
Prep time: 40 min
Cook time: 1 h 40 min
Total time: 1 h 40 min
Yield: 6 portions
Ingredients: 120 g Cheddar cheese; 1 slice wholemeal bread; 50 g Parmesan cheese; 5 g fresh parsley leaves; 900 g water; 1 ½ - 1 ¾ tsp fine sea salt; 1 cauliflower; 230 g macaroni pasta; 2 garlic cloves; 30 g unsalted butter; 40 g plain flour; 600 g skimmed milk; 2 pinches ground cayenne pepper; ¼ tsp ground white pepper; 2 tsp Dijon mustard; 2 tomatoes