Cut tomatoes, garlic, and onions in halves/quarters. Place on a baking tray, drizzle with olive oil, season with salt, oregano, and basil.
Roast in the oven at 180 °C (350 °F) for 45–50 minutes.
In a pot, melt the butter and briefly sauté the tomato paste.
Add the roasted vegetables, pour in the water.
Season with salt and pepper, then blend with an immersion blender or in a blender until smooth.
Stir in the cream. Top with a little cream when serving.
Place 1 slice of cheddar and 1 handful of grated cheese between two slices of bread.
Fry in a pan with a little butter or oil until golden brown on both sides and the cheese is melted.