When I have exams or just have to catch up with my studying I usually make one of these or a Taco pie so that I don't have to worry about spending loads of time cooking a new meal twice a day.
What you need:
500g ground beef
One large red onion
500g crushed tomatoes
2 tablespoons of tomato purée
For the béchamel sauce:
2 tablespoons butter
2 tablespoons flour
How you make it:
Step1: Preheat the oven to 225 degrees Celsius.
Step2: Start by chopping the onion into fine pieces, grate the carrots and slice the cherry tomatoes and put them to the side.
Step3: In a pan fry the ground beef, when it is half way done add the onions.
Step4: when the beef is done add the carrots, crushed tomatoes and tomato pure.
Step5: add salt and pepper and leave it on low heat.
Step6: In a pan on medium high heat, melt the butter then add the flour and combine it well so that there are no lumps.
Step7: While stirring ad the milk one dl at a time and stir for about 30 seconds in between each dl then let it thicken. Season it with salt and pepper.
Step8: Start with a layer of tomato sauce, then a layer of béchamel, a layer of sliced cherry tomatoes and then the lasagna sheets (I put them in when they're ''raw'' but you can cook them before too).
After that you do it all over again - tomato sauce, béchamel, tomatoes and sheets but then you top it off with a layer of béchamel and then a layer of grated cheese.
Step9: Cook it in the oven for about 45 minutes and then take it out and enjoy!