In a high speed blender or food processor, add shallot, cottage cheese, mayonnaise, and vinegar. Process until smooth, scraping down the sides as necessary, about 3 minutes. Pour in milk. Scrape down the sides. Add dill, salt and pepper and process until combined. Makes 1 1/4 cups.
Combine chickpeas, cucumber, tomatoes, cheese and onion in a medium bowl. Add dressing and pepper and toss to coat.
Extra dressing can be refrigerated for up to 1 week.
Adapted from Eating Well