Knead the herb butter with the breadcrumbs and the chopped thyme.
Season the medallions with salt and pepper. Heat the oil in a pan, fry the medallions for 2 minutes on each side, then place in an ovenproof dish.
Spread the breadcrumbs and herbs mixture on the medallions. Bake in a preheated oven at 175 ° for about 10 minutes. Put the baguette in the oven accordingly (after approx. 2 minutes).