Preheat oven to 425 degrees F. On a rimmed baking sheet, add the 4 cups cauliflower florets, sliced 1 medium sweet onion, chopped 2-4 cloves garlic, 2 tablespoons extra-virgin olive oil, 1 teaspoon kosher salt, ¼ teaspoon black pepper, and crushed red pepper flakes, if using. Toss together to coat everything well (use a bit more olive oil if it seems dry or to personal preference), spread out evenly, and roast for about 20 minutes, or until veggies start to brown and soften (see notes).

Remove the baking sheet from the oven and toss veggies to flip around and redistribute, spread out evenly on the pan. Sprinkle the top with the 1 cup Panko breadcrumbs and place back into the oven, roasting for another 10 minutes or so, or until breadcrumbs are golden and veggies have browned and softened.

While cauliflower is roasting, cook the 8 oz. dry pasta until al dente according to package directions in heavily salted water (I usually use about 2 tablespoons of kosher salt when I cook dry pasta).

Use a slotted spoon or tongs to transfer the cooked pasta directly into a large mixing bowl along with 2 tablespoons extra-virgin olive oil, 1 tablespoon capers, 2 tablespoons lemon juice, and 2 tabespoons chopped fresh parsley. If it all seems a bit dry, you can add a couple of tablespoons of the pasta cooking water (not too much - you don't want it to be too watery so the breadcrumbs don't get soggy!).

Once cauliflower is done roasting, remove from the oven and toss with the pasta mixture. Taste and adjust seasoning if necessary. Serve garnished with more parsley and red pepper flakes, a drizzle of olive oil, and fresh cracked black pepper, if desired.