01 -
Get your oven ready by putting the rack in the middle and warming it to 400°F for even heat all around.
02 -
Cut onion into tiny bits, then warm up the oil in a big pan on medium-high heat until it looks glossy.
03 -
Toss onion, meat, salt and pepper into the pan, smashing the beef into tiny chunks as it turns brown.
04 -
Let the meat cool a bit, then stir in most of the tomato sauce but keep some for the pan bottom.
05 -
Smear a thin coat of plain tomato sauce across the bottom of your 9x13-inch dish.
06 -
Put 5 pasta sheets in the dish, snap them if they don't fit, then spread 1 cup ricotta and 1.5 cups meat mix.
07 -
Scatter 1 cup mozzarella on top of the meat mix to finish your first full lasagna layer.
08 -
Go again with pasta, ricotta, meat mix, and mozzarella, but save some cheese for the top at the end.
09 -
Lay down last pasta sheets and leftover sauce, then wrap the dish tight with foil to keep moisture in while cooking.
10 -
Pop it in for one hour covered, then stick a knife through to check if the pasta's soft enough.
11 -
Take off the foil, sprinkle the last cheese on top, and cook 8-10 minutes till it bubbles and gets a little golden.
12 -
Wait 15 minutes before cutting so everything firms up and your slices come out looking good.