Stir 2 cups lukewarm water and yeast in large bowl to blend.
Mix in 3 tablespoons olive oil, truffle oil, cracked pepper, and 2 teaspoons salt.
Add 1 cup flour. Using wood spoon, stir vigorously until well incorporated.
Let dough rise in warm draft-free area until doubled in volume, about 45 minutes (do not punch down dough).
Lightly oil 15x10x1-inch baking sheet. Slide out dough onto prepared baking sheet (dough will be soft and will easily slide out onto sheet; do not punch down dough or knead dough). Gently pull and stretch dough so that dough almost covers baking sheet. Press fingertips all over top of dough to form indentations.
Brush top of focaccia with remaining 1 tablespoon olive oil.
Sprinkle with thyme, rosemary and coarse salt. Cover loosely with plastic wrap.
Let rise in warm draft-free area until puffed, about 30 minutes for refrigerated dough and about 15 minutes for room-temperature dough.
Meanwhile, position rack in center of oven and preheat to 450°F.
Bake focaccia until deep golden brown, about 30 minutes.
Transfer to rack and cool.
*Available at Italian markets, specialty foods stores and some supermarkets.