01 - Heat olive oil in a large non-stick frypan over medium heat. Add onion and cook for 2 minutes until softened. Add garlic and cook for 30 seconds.
02 - Add ground meat and cook, breaking it up, until browned (about 5 minutes). Drain excess fat if necessary.
03 - Stir in crushed tomatoes, tomato paste, oregano, basil, salt, pepper, and water. Bring to a simmer.
04 - Nestle broken lasagne sheets into the sauce, pressing them down so they are mostly submerged. Cover and simmer on low for 10 minutes, stirring occasionally to prevent sticking.
05 - In a bowl, mix ricotta and Parmesan until well combined.
06 - After 10 minutes, dollop spoonfuls of the ricotta mixture over the pasta and sprinkle with half the mozzarella.
07 - Cover and cook for another 10 minutes, or until pasta is tender and cheese is melted.
08 - Remove lid, sprinkle remaining mozzarella over the top, and cover for 2 minutes to melt.
09 - Let rest for 5 minutes before serving to allow layers to set.