Debark the toast and cut into small cubes. Peel garlic, cut in half and press one half through a garlic press. Heat butter in a pan and add garlic. Roast the diced toast in the garlic butter until golden brown all around and remove.
Clean, wash and drain the salad and pluck into bite-sized pieces. Clean, wash and slice the radishes. Dice cheese. Arrange salad, radishes and cheese on plates. Mix vinegar, salt and pepper.
Finely chop the remaining garlic half and stir in. Whip the oil into the mixture. Pour the vinaigrette over the salad and serve sprinkled with croutons.