Prepare the Baking Dish: Position a rack in the upper third and one in the lower third of the oven. Preheat to 375°F (190°C). Lightly spray a small round baking dish with cooking spray. In a small bowl, mix the RAGÚ sauce, grated garlic (2 cloves), half of the chopped basil, and red pepper flakes. Pour the sauce mixture into the prepared baking dish.
Prepare the Goat Cheese: Form the goat cheese into a ball, then flatten it between two sheets of plastic wrap to form a thick, round disc about 1 inch smaller in diameter than the baking dish. Remove plastic wrap and place the cheese disc in the center of the sauce. Drizzle with 2 tsp olive oil, sprinkle with thyme, and season with kosher salt and fresh pepper.
Bake the Dip: Place the baking dish in the lower third of the oven, uncovered, and bake for 20-25 minutes, or until the sauce is bubbling and the goat cheese is warmed through.
Make the Crostini: While the dip bakes, arrange the baguette slices on a baking sheet. Drizzle or brush each slice with olive oil and sprinkle with kosher salt. Place the baking sheet in the upper third of the oven during the last 10-12 minutes of baking. Flip halfway through for even toasting. Once golden and crispy, rub each slice with a halved garlic clove for added flavor.
Serve: Top the dip with the remaining chopped basil and garnish with blistered tomatoes, if desired. Serve warm with crostini on the side.