Den Backofen auf 180°C (160°C Umluft) vorheizen. Währenddessen 1½EL Butter in eine hitzebeständige Schüssel geben und 3–4Min. im Ofen weich werden lassen. Dann mit einer Gabel die ½ der Gewürzmischung sowie 1 Prise Salz unter die weiche Butter rühren. 800ml Wasser in einem Wasserkocher aufkochen.
Cut slits diagonally along the length of the bread. Fill the slits of the bread with some of the garlic-herb butter and spread the rest on top. Bake on a parchment-lined baking tray for ca. 10min. until the bread becomes crispy.
Meanwhile, zest, then halve and juice the lemon. Finely chop the parsley.
Heat up 3Tbsp olive oil in a medium-sized pot on medium-low heat. Add the contents of the minestrone soup package and toast it for ca. 30sec. Then add the parsley and a large pinch of salt, reserving some of the parsley for garnishing.
Carefully add the hot water from the kettle and the tinned cherry tomatoes to the pot. Turn up the heat to medium-high and bring the soup to a strong simmer. Cook for 13–15min.
Slice the bread. Refine the soup to taste with the lemon zest, juice and salt. Add more water for a more liquid soup, if you want. Garnish the soup with the cheese and the reserved parsley and serve with the bread on the side.