Dairy (nonfat, no hormones) is a great source of protein and should be a part of your diet. If you are lactose intolerant a whey supplement can be added.
A whey protein shake can be consumed either as a meal or a snack. I do not recommend blending fruits often as it reduces the fiber so vital for health, a shake made with a scoop of whey protein powder, a cup of (non fat no sugar added) yogurt and a banana can be a great alternative breakfast or desert. Yesterday I pulled an abstract study from Nature/obesity/journal.org that looked at the benefits of whey protein and found significant improvement over 12 weeks in vascular function and blood pressure both diastolic and systolic in overweight individuals.
Limit to one scoop a day for woman, two for men, half servings for the kids!