Cook pasta according to package instructions. Drain and reserve 1 cup pasta water
In an oven safe casserole dish, place block of feta in the middle. Arrange tomatoes and blood orange slices around the feta, and throw in olives. Drizzle generously with ½ cup of olive oil, sprinkle with salt and pepper. If using dried oregano, sprinkle now.
Throw into the oven at 400F for 20 mins. Then set to grill setting (or 450F) and let broil for another 10 mins.
Remove from oven, and smash tomatoes and feta thoroughly with a fork. Remove orange rind and discard. Add pasta and fresh basil, if using. Add reserved pasta water if needed. Mix thoroughly and serve immediately.