Preheat the oven to 375F (190C).

Make the sauce by combining the heavy cream, shredded Parmesan, garlic paste, and paprika in a large bowl. 

Add the chicken and stir well. Transfer everything to a baking dish (I used 9 x 13" which left plenty of room to add the spinach). Season well with salt and black pepper.

Bake in a preheated oven for 20 minutes, then stir in the spinach.

Return to the oven for 10-15 minutes or until the chicken is cooked through and the sauce has reduced and thickened.