In a food processor or blender, combine the onion, garlic, jalapeo pepper, bell pepper, cucumber, tomatoes, salt, pepper, cumin, vinegar, and breadcrumbs. Pulse until chopped. With the machine running, add the oil in a thin stream.
Add the dill and pulse once to combine. Dice the avocado and add it to the sauce.
In a large pot of boiling, salted water, cook the pasta until just done, about 10 minutes.
Drain the pasta and toss with the sauce.
Add a pinch of cayenne.
Wine Recommendation: Beer suits this dish better than any wine.
Serve your own favorite or a cold, light Mexican beer such as Corona.