First up, gather all of your ingredients and get a large pot of water on.
Cook your penne as per the directions - use the lower of the time frame.
Time for the sauce.
Dice the onion and cook in the olive oil. Then, wash and cut the spinach. Add to the onions once they are translucent. Then, add in the jar of pasta sauce. Melt the cream cheese into the sauce.
Once your pasta is cooked, strain it.
Layer time! Put down a bit of sauce on the bottom so the pasta doesn't stick. Now layer, half the penne, half the cottage cheese, half the sauce, and then half the shredded mozzarella cheese. Repeat again in the same order.
Bake at 350 degrees for 20-30 minutes until the cheese is melty and starts to brown.-image-11301"
Done! Time to eat up and enjoy.