Heat olive oil in a 6-8 qt pot over medium heat. Add minced garlic. Saute until just beginning to brown. Add onions, saute until translucent
Add chicken broth and bring to a boil. Turn heat down to medium, add chicken, potatoes, and carrots. Simmer, stirring occasionally, until vegetables are tender and chicken is cooked, about 45 minutes.
Just before serving, add cooked orzo, rice, or other pasta. I used thin spaghetti, broken into 2 inch size pieces. Stir to mix. Serve soup with salt and pepper to taste, and grated parmesan cheese, if desired.