Preheat the oven to 400°F (200°C).
Cut the boneless, skinless chicken breasts into approximately 1-inch pieces, then transfer the chicken to a mixing bowl.
Add the cottage cheese, finely chopped spinach, drained and chopped artichoke hearts, minced garlic, and grated Parmesan to the bowl containing the chicken.
Stir the ingredients thoroughly until the chicken and remaining components are evenly combined.
Pour the olive oil into the bottom of a 9 × 13-inch baking dish, distributing it across the base of the pan.
Transfer the chicken mixture to the prepared baking dish and spread it into an even layer.
Bake uncovered in the preheated oven for 25–30 minutes, or until the chicken is completely cooked through and has reached a safe internal temperature.
Remove the finished spinach artichoke chicken from the oven and serve while hot. Garnish with additional fresh spinach, if desired.