Preheat oven to 375 degrees F.
Heat olive oil in a skillet. Add in chopped onion, garlic, salt, pepper and cook for 5 minutes over medium heat.
Add ground pork into skillet and cook until browned. Drain grease.
Stir in can of drained diced tomatoes and jar of spaghetti sauce. Warm for 10 minutes or until thickened. Remove from heat.
Combine ricotta cheese, egg, parmesan cheese, basil, and oregano in a bowl. Mix well, set aside.
Spread two cups of ground pork sauce mixture over the bottom of a 3 quart lasagna baking dish.
Arrange three uncooked lasagna noodles in a layer on top of the sauce mixture.
Spoon half of the ricotta mixture over the noodles and spread evenly.
Sprinkle half of the mozzarella cheese over the ricotta layer.
Repeat the layers. Two cups of pork sauce mixture, lasagna noodles, ricotta, mozzarella.
Finish by sprinkling the remaining mozzarella cheese as the top layer of the lasagna.
Cover with aluminum foil. Bake for 45 minutes at 375 degrees F.