1. Cook pasta in a large pot of salted water until al dente, 9 to 10 minutes. Add beans during last minute of cooking. Drain and return to pot, reserving 1/2 cup pasta water.

2. Meanwhile, combine parsley, lemon juice and zest, and 1 tablespoon oil in a food processor; pulse until finely chopped. In a large skillet, heat remaining oil over medium-high. Add garlic and red-pepper flakes; cook, stirring often, until golden brown, 3 to 4 minutes. Add tomatoes, season with salt, and cook until tomatoes burst and thicken, adding a little pasta water until consistency is saucy.

3. Toss parsley mixture and remaining pasta water with pasta; season with salt and pepper. Serve, topped with tomato sauce and sprinkled with parsley and cheese.