01 - Preheat the oven to 400°F.
02 - In a large baking dish, combine cherry tomatoes, garlic, red onion, olive oil, oregano, red pepper flakes, salt, and pepper. Toss to coat evenly.
03 - Create a space in the center of the dish and place the block of feta cheese. Drizzle additional olive oil over the feta.
04 - Roast for 30–35 minutes, until tomatoes burst and feta becomes golden and soft.
05 - While roasting, cook pasta in a large pot of salted boiling water until al dente. Reserve ½ cup pasta water before draining.
06 - Remove baking dish from oven. Using a fork or spoon, mash feta and tomatoes together until a creamy sauce forms.
07 - Add drained pasta and most of the basil to the dish. Toss thoroughly, adding reserved pasta water as needed to reach desired sauce consistency.
08 - Serve immediately, garnished with additional basil and freshly ground black pepper.