Pasta Salad with Mozzarella, Tomatoes, and Olives

1 garlic clove, peeled

2 cups coarsely chopped pitted green olives (from about 6 ounces unpitted whole olives), divided

3 tablespoons capers, drained

1 tablespoon red wine vinegar

1 teaspoon anchovy paste

1 tablespoon Dijon mustard

1/4 teaspoon dried crushed red pepper

1/2 cup plus 1 tablespoon extra-virgin olive oil

1 pound gemelli, fusilli, or rotelle pasta

2 pints cherry tomatoes or grape tomatoes, halved

1 8-ounce package small (cherry-size) fresh mozzarella balls in water

2 tablespoons chopped fresh oregano

With food processor running, add garlic clove to bowl through feed tube and process until finely chopped; turn off machine. Add 1 cup chopped olives, capers, red wine vinegar, anchovy paste, mustard, and crushed red pepper. Using 6 on/off turns, process to chop coarsely. With machine running, gradually add 1/2 cup olive oil, forming coarse puree. Transfer to bowl; stir in remaining 1 cup olives. Season olivada to taste with salt and pepper.

DO AHEAD: Olive mixture can be made 3 days ahead. Cover and refrigerate.

Cook pasta in large pot of boiling salted water until just tender but still firm to bite, stirring occasionally. Drain well. Transfer drained pasta to large bowl. Drizzle remaining 1 tablespoon oil over pasta; toss to coat. Cool, stirring occasionally.

Add olivada, halved tomatoes, mozzarella, and oregano to pasta; toss to coat. Season to taste with salt and pepper.