Heat the olive oil in a large Dutch oven over medium heat. Add the chicken and cook for 5 to 6 minutes, stirring occasionally, until lightly browned.
Add the diced onion and cook for 4 minutes, stirring occasionally, until softened.
Stir in the garlic, Italian seasoning, basil, oregano, salt, and black pepper. Cook for 30 seconds.
Add the chicken broth, cannellini beans, diced tomatoes, and sun-dried tomatoes. Stir and bring to a boil.
Reduce the heat to low, cover, and simmer for 15 minutes, or until the chicken reaches an internal temperature of 165°F.
Stir in the chopped spinach and milk. Simmer gently for 2 to 3 minutes, until the spinach wilts.
Place the Greek yogurt in a small bowl. Slowly whisk in about ½ cup of the hot soup broth, adding a little at a time until smooth.
Reduce the heat to its lowest setting and stir the yogurt mixture into the soup.
Add the Parmesan cheese and stir until melted and blended into the broth.
Notes
Estimated WW Points: 5 (Check official WW app for exact points)
Tips and Tricks
Prevent Curdling - Use plain Greek yogurt at room temperature if possible. Avoid boiling the soup after adding it.Drain the Sun-Dried Tomatoes - Let excess oil drip off before chopping. This helps keep the broth from becoming greasy.Adjust the Thickness - If the soup becomes too thick, stir in a little additional chicken broth until it reaches your preferred consistency.Use Freshly Grated Parmesan - Freshly grated cheese generally melts more smoothly than packaged grated Parmesan.
Storing and Reheating
Refrigerator - Cool the soup promptly and store in an airtight container in the refrigerator for up to 3 to 4 days.Freezer - Freezing is possible, but the Greek yogurt and milk may separate when thawed. For best texture, refrigerate rather than freeze.Stovetop - Reheat over low heat, stirring frequently until the soup reaches 165°F. Avoid boiling, which can cause the dairy to separate.Microwave - Heat individual servings in a microwave-safe bowl in short intervals, stirring between each, until heated to 165°F.