01 -
Position oven rack in middle and preheat to 400°F, ensuring proper temperature for even cooking.
02 -
Finely dice onion, heat olive oil in large skillet over medium-high until it shimmers with warmth.
03 -
Add onion, beef, salt, and pepper to skillet, breaking meat into small pieces while cooking until nicely browned.
04 -
After meat cools slightly, combine with most of the marinara sauce, reserving some for the bottom of pan.
05 -
Spread thin layer of plain marinara sauce across bottom of 9x13-inch baking dish carefully.
06 -
Layer 5 noodles in dish, breaking if needed to fit, then spread 1 cup ricotta and 1.5 cups meat sauce.
07 -
Sprinkle 1 cup mozzarella over meat sauce, creating first complete layer of lasagna structure.
08 -
Repeat layers: noodles, ricotta, meat sauce, and mozzarella, saving some cheese for final topping.
09 -
Add final layer of noodles and remaining sauce, cover dish tightly with foil to trap moisture.
10 -
Bake covered for one hour, then check noodle tenderness by inserting knife through all layers.
11 -
Uncover, add remaining mozzarella cheese, bake 8-10 minutes until cheese bubbles and browns lightly.
12 -
Let lasagna rest for 15 minutes before cutting, allowing layers to set properly for clean servings.