Warm olive oil and butter in a large Dutch oven or stockpot over medium-high heat.
Add onion and carrots and sauté, stirring frequently, for 4-5 minutes. Add garlic and Italian seasoning. Cook for 30-60 seconds, just until fragrant.
Stir in broth and bring to a boil. Add the shredded chicken, then reduce heat to medium and let the broth simmer for 8-10 minutes, stirring occasionally.
Stir in the beans and greens. Allow about 1 minute for the greens to wilt. Add lemon juice, parsley, salt, and pepper. Serve and enjoy!
Notes
Adjust to taste! You may want to add more lemon juice, salt, and/or pepper according to your tastes. Start with the amounts listed here, and add more if desired.
No Italian seasoning? Substitute 1/4 teaspoon each of basil, oregano, rosemary, and thyme.
Want some kick? Add 1/4 teaspoon (or more) red pepper flakes along with the garlic and Italian seasoning.
Want to add pasta? Add it directly into the pot after the broth comes to a boil (along with the chicken) and cook according to package directions.