Brown the ground beef and chopped onion in a large pot or skillet over medium heat.

Season with salt and pepper to taste.

Drain any excess fat from the beef mixture.

Add the pureed tomatoes, tomato sauce, and spaghetti sauce mix to the pot.

Pour in the tomato juice.

Stir all ingredients together well.

Reduce heat to low and simmer for at least 30 minutes, stirring occasionally.

Assemble the lasagne by layering the meat sauce, pasta sheets, and cheese (not listed in ingredients but implied).

Bake in a preheated oven at 375°F (190°C) for approximately 60 minutes, or until bubbly and golden brown.

Let it rest for 10 minutes before serving.