In a small bowl, whisk together the honey, Dijon mustard, apple cider vinegar, minced garlic, dried thyme, salt, and pepper until well combined. Set aside.
Heat olive oil in a large skillet over medium-high heat.
Season the chicken thighs with salt and pepper, then place them in the skillet. Cook for about 5-6 minutes on each side, or until the chicken is golden brown and cooked through.
Reduce the heat to medium-low and pour the honey mustard sauce over the chicken in the skillet. Stir to coat the chicken evenly.
Add the cherry tomatoes to the skillet and simmer for an additional 3-4 minutes, allowing the sauce to thicken slightly and the tomatoes to soften.
Finally, stir in the fresh spinach until it wilts down, about 1-2 minutes.
Once everything is heated through and well combined, remove from heat and garnish with fresh parsley.
Notes
Serve with rice or crusty bread to soak up the sauce.