Scrub potatoes and cut into quarters (peel off any dark or damaged spots). Transfer potatoes into large pasta pot, add enough water to cover by 1-2 inches (about 8-10 cups with 1 tbsp salt) and bring to a boil. Once potatoes are fork-tender, drain completely and return to pot. Drizzle cooked potatoes with olive oil and stir to distribute. Add roasted garlic and fresh herbs, and season to taste with salt and black pepper. Lightly mash potatoes with a fork, just enough to blend in olive oil and roasted garlic (they should still appear chunky). Serve immediately.