Ground beef and ricotta lasagna

Ingredients

• about 300 gram ground beef
• 2 cans of tomatoes (whole or chunks - 800 gram)
• 1 can of tomato paste (140 gram)
• 1 onion
• 3 garlic cloves
• 3 tablespoons Italian herbs
• 250 gram ricotta
• 2 eggs
• large handful of grated cheese
• large handful of parmesan cheese
• about 12 lasagna sheets
• olive oil
• pepper and salt to taste
• parsley or basil for garnish