Preheat oven to 325 F. In a small frying pan, brown the garlic in the butter for 1 minute. Then add the spinach to the pan. Cook for 1 - 2 minutes or until the spinach is tender. Chop the cooked spinach into small bits.
In a mixing bowl add the ricotta cheese, chop up and add the basil as well as the spinach and garlic. Add in the salt and stir until well combined. Using a tsp, make 16 small balls with the ricotta mixture.
Cut the cheese slices in half, then spread out onto 2 parchment paper (Not Wax Paper) lined baking sheets. Bake the cheese slices, until fully melted, approx. 4-5 mins. Remove from the oven and let cool slightly before adding one ball of ricotta to each slice.
Fold the rectangles in half, making square shapes. Firmly press the sides closed. Return to oven for 3 - 4 minutes. Broil for 2 minutes, push side in with a fork into squares. Broil another 2 minutes.