1. Combine oil, garlic, anchovy paste, pepper flakes, and oregano in bowl. Process tomatoes in blender until finely chopped but not puréed, 15 to 45 seconds. Transfer to fine-mesh strainer set in large bowl and let drain for 5 minutes, occasionally pressing gently on solids with rubber spatula to extract liquid (this should yield about 3/4 cup). Reserve tomato liquid in bowl and tomato pulp in strainer.

2. Bring 4 quarts water to boil in large pot. Add campanelle and 1 tablespoon salt and cook, stirring often, until al dente. Reserve 1 cup cooking water, then drain campanelle and return it to pot.

3. While campanelle is cooking, cook garlic-anchovy mixture in 12-inch skillet over medium heat, stirring frequently, until garlic is fragrant but not brown, 2 to 3 minutes. Add tomato liquid and simmer until reduced to 1/3 cup, 2 to 3 minutes. Add tomato pulp, olives, and capers; cook until just heated through, 2 to 3 minutes. Stir in parsley.

4. Pour sauce over campanelle and toss to combine, adding reserved cooking water as needed to adjust consistency. Season with salt to taste. Serve immediately.

Serves 4