Set the pot over medium-high heat. Add the bell peppers, shallots, garlic, basil, oregano, dill, chili flakes, salt, and pepper. Cook until the peppers deeply soften and the garlic is fragrant, about 5 minutes. Add 4 cups water. Bring to a boil, add the pasta, and cook, stirring often, until the pasta is al dente, about 7 minutes.