Preheat oven or toaster oven to highest setting. Pour oil over cut side of garlic bulb and rub into skin. Double wrap garlic in foil and roast 20 to 25 minutes in toaster oven or hot conventional oven.
Combine walnuts, feta, milk, oregano, parsley, black pepper, red pepper and garlic clove in food processor and pulse process until spread is smooth. Scrape spread into serving dish with spatula. Drizzle dip with extra-virgin olive oil and serve.
When you remove garlic from the oven, turn heat off. Arrange triangles of cut pita or flat brad on a small tray or cookie sheet. Place bread into the hot toaster oven or conventional oven. The bread will be warmed through and lightly toasted in 5 minutes.