Sourdough bread: 80g (2 slices), Cheddar cheese (reduced-fat): 20g (1.5 tbsp, shredded), Gruyere cheese: 15g (1 tbsp, shredded), Butter: 5g (1 tsp), Canned tomatoes (diced): 200g (1 cup), Water: 180ml (3/4 cup), Garlic: 3g (1 clove, minced), Onion: 30g (1/5 cup, diced), Olive oil: 5ml (1 tsp), Dried thyme: 0.5g (1/8 tsp), Smoked paprika: 0.5g (1/8 tsp), Fresh basil: 2g (1 tsp, chopped), Salt and black pepper: to taste