Form 12 small rounds of goat cheese and put in a small low-rimmed glass dish. Top with olive oil and chopped thyme. Let sit, refrigerated, for 1 hour.

In a small mixing bowl, combine bread crumbs, dried thyme, black pepper and salt. Coat goat cheese rounds on all sides.

Preheat oven to 350 F. Place goat cheese rounds on a baking sheet and bake for 15 minutes, until golden brown. Remove with a spatula.

In a small bowl, whisk together vinegar, mustard, and oil. Salt and pepper to taste. Combine dressing and salad greens. Top with goat cheese cakes.