Lightly toast the bread in a toaster or under a broiler. Rub the top side of the toast with the garlic clove.
Place a round of goat cheese on the toast, top with a sprig of thyme, a grinding of black pepper, and drizzle with the olive oil.
Set the toasts on a small baking sheet and broil about 6 in. (15 cm) from the heat for 3 to 5 minutes, until the cheese is soft.
In a medium mixing bowl mix the greens and half the vinaigrette, tossing to combine well.
Divide the greens among 4 plates, and top with the goat cheese toast.
Serve the remaining dressing on the side.