Heat olive oil in a large skillet over medium heat.
Add the diced onion and garlic, sautéing until fragrant.
Stir in the cubed chicken and cook until no longer pink.
Add the mixed vegetables and sauté for a few more minutes.
Pour in the chicken broth and bring to a simmer.
Add the heavy cream, dried thyme, salt, and pepper.
Simmer for 10-15 minutes until thickened.
Adjust seasoning as needed, then remove from heat.
Serve hot, garnished with fresh herbs if desired.