Heat the oven to 180C fan / gas mark 4
Finely chop your onion and garlic
Add your oil to a pan and fry off the onion until soft
Add your garlic and cook for a couple of minutes
Add your mince and cook until browned off
Add your tinned tomatoes and simmer for a few minutes
Add in your tomato puree and stir through
Season with salt, pepper and oregano
Allow this to simmer away for 15 minutes or so. If you're opting for a homemade white sauce, now is the time to make this
Time to layer! Add a layer of your mince, followed by your lasagne sheets, white sauce and grated cheese. Repeat until you've used up all your ingredients!
Bake in the oven for 45 minutes until the top is bubbling and lightly browned
Finish with a sprig of basil if you're serving / eating straight away
Alternatively, allow to cool thoroughly before boxing up and freezing!