Spray lg skillet w/ cooking spray. Heat ovem to 325, lightly spray a lg baking sheet w/ cooking spray. Place skillet over madium-low heat. Cook and stir, chicken cubes, onion and garlic for 5 mins.
Stir in spinach. Cook, stirring until spinach is wilted, about 5 mins. Transfer mix to lg bowl. Combine w/ ricotta cheese, parmesan cheese and butter. Mix until creamy.
Unroll dough and pinch 2 triangles together to make a rectangle. Repeat w/ remaining dough. Place about 1 tbsp of mix onto center of each recatngle. Fold corners together and pinch to seal. Place puffs on baking sheet. Bake 12 mins, or until golden brown.