On a plate, mix together the sesame seeds, thyme and coarse black pepper. Dip the cheese slices on one side only. In a very hot non-stick pan coated lightly with olive oil, pan sear the crusted side only until golden brown. Meanwhile, whisk together the mustard, vinegar and extra virgin olive oil. Season and check for flavor. In a hot saute pan coated lightly with olive oil, saute the shallots and shiitakes until soft, about 3 minutes. Add the tomatoes and deglaze with the vinaigrette. Check for seasoning. In a large bowl, toss the arugula with half of the vinaigrette and check for flavor. Add more vinaigrette if needed. Also, slice the head garlic in half and lightly rub the bread with the garlic and grill until golden brown.