Preheat oven to 220 degrees C (425 degrees F) or 200 degrees C fan oven (400 degrees F).
Cut Tomato (2 kilogram), Onion (1), Garlic (4 clove), Carrot (1), and Fresh Basil (1 handful) into chunks and transfer into a deep baking dish to collect all the juices later.
Mix all the seasoning ingredients: Granulated Sugar (1 tablespoon), Mushroom Seasoning (1 teaspoon), Salt (to taste), Dried Oregano (to taste), Ground Black Pepper (to taste), and Olive Oil (1/2 cup) together.
Drizzle in the seasoning and toss well.
Roast it for 30 to 40 minutes.
Place the mixture into a blender and puree until smooth.
Transfer into a pot and add in Water (2 cup). Taste it for seasoning in case you may want to adjust and bring it to a boil.
For the croutons, preheat your oven to 220 degrees C (425 degrees F) or 200 degrees C fan oven (400 degrees F).
Slice a Baguette (1), seasoning them with Olive Oil (4 tablespoon), Dried Basil (1 tablespoon) and Ground Black Pepper (to taste).
Transfer into a baking tray and toast them for 5 to 10 minutes until crispy golden brown.