In a mixing bowl, combine ricotta, parmesan, spinach, onion powder, and Italian seasoning, and mix well. Season with salt to taste. Mix in the egg. Set aside.
Step 2: Flatten the chicken breasts
Butterfly each chicken breast. Place each chicken breast between two pieces of plastic wrap.Using a meat mallet or meat pounder, pound the chicken breasts until they are very thin and have about doubled in area.
Step 3: Stuff the chicken
Make the chicken rolls by scooping a quarter of the stuffing onto each chicken breast. Roll tightly, making sure to seal the ends. You can also pin them with toothpicks to prevent them from coming apart.Cover the rolls with plastic film and freeze them (they must be frozen hard for the next step). If you wish, you can freeze for several days and complete the following steps at a later date.
Step 4: Wrap the chicken roll ups
Wrap the rolls tightly with bacon slices. Do not let the chicken rolls thaw before cooking. Place the baking roll on a baking tray with a wire rack. Tuck the bacon ends under the rolls.While you make the roll-ups, preheat the oven to 400 ºF [205 ºC].
Step 5: Cooking the chicken rolls
Cook for 20 minutes, or until the bacon has turned crispy and golden brown at the top. Remove the pan from the oven and rotate.Return to the oven and cook for 20 more minutes, or until the top side of the bacon is also crispy, and the internal temperature read with an instant-read thermometer reaches 165 degrees ºF [74 ºC].
Step 6: Making the sauce
While the chicken is in the oven, heat the olive oil in a saucepan or skillet over very low heat. Stir in the garlic, and cook covered for two minutes, or until the garlic releases its aroma. Pour the tomato sauce and half the parsley. Simmer covered for 15 minutes. Season with saltandpepper to taste.Remove from the heat and mix in the remaining parsley (you can save some for garnishing when served).
Step 7: Serving
Ladle the sauce onto a large shallow dish. Place the chicken roll-ups on the sauce and serve (remember to remove the toothpicks if you used any).