I set my oven to 375 °F (190–200 °C) so it’s ready when I’m done mixing. Meanwhile, I lightly grease the baking dish so nothing sticks.
Next, I stir the softened cream cheese and the basil pesto in a bowl until smooth and well blended. I taste and adjust — maybe a pinch of salt or extra pesto if I want more herb flavor.
I lay the chicken breasts flat in the greased baking dish, then spread the pesto mixture evenly over each piece. After that, I sprinkle the shredded mozzarella on top. Into the oven it goes, uncovered, until the internal temperature reaches about 165 °F (74 °C), which usually takes between 30 and 45 minutes.
Once baked, I garnish with halved cherry tomatoes and chopped basil before serving.