Bucatini with Clams and Red Peppers

Name: Bucatini with Clams and Red Peppers
Ingredients: 1/3 cup walnuts; 2 large red bell peppers; 6 tablespoons extra-virgin olive oil, plus more for drizzling; 2 large garlic cloves, minced; 1 1/2 pounds plum tomatoes, peeled and coarsely chopped; 1 teaspoon ground cumin; 1 teaspoon smoked paprika; 1/4 cup fresh orange juice; 1 tablespoon pomegranate molasses; 32 littleneck clams, scrubbed; 1 pound bucatini; 1/4 cup chopped mint; 1/4 cup chopped flat-leaf parsley; 1/4 cup chopped basil; Salt