To make the sauce, heat the olive oil in a small saucepan over medium-high heat. Add the minced garlic, and saute until fragrant, about 30 seconds. Add the tomatoes, thyme, and a pinch of salt and pepper and allow to simmer while you prepare the remaining ingredients. Remove the thyme sprigs before using.
To make the herb seasoning, combine the basil, oregano, garlic, fennel, and a pinch each of red pepper flakes, salt, and pepper.
Cut the bread in half lengthwise, then cut each half in two, so you have 4 pieces total. Place the bread cut side up on a cookie sheet and then place a heavy cast iron skillet on top. Press down firmly to flatten the bread by about half.
Toast the bread for about 5 minutes.
Spread the pizza sauce evenly onto the bread. Top with cheeses, pepperoni and herb seasoning.
Bake the pizzas until the cheese is melted and bubbling, about 10 minutes. Remove from the oven and top with fresh basil and additional crushed red pepper flakes, if desired. Enjoy!