How to Make Lasagna
For this recipe, we are essentially making a thick, meaty tomato sauce and layering that with noodles and cheese into a casserole. Here's the run-down:

Start by making the sauce with ground beef, bell peppers, onions, and a combo of tomato sauce, tomato paste, and crushed tomatoes. The three kinds of tomatoes gives the sauce great depth of flavor.
Let this simmer while you boil the noodles and get the cheeses ready. We're using ricotta, shredded mozzarella, and parmesan -- like the mix of tomatoes, this 3-cheese blend gives the lasagna great flavor!
From there, it's just an assembly job. A cup of meat sauce, a layer of noodles, more sauce, followed by a layer of cheese. Repeat until you have three layers and have used up all the ingredients.
Bake until bubbly and you're ready to eat!
How to Store and Reheat Leftovers
Half the pleasure of making a lasagna is enjoying the leftovers! The lasagna will keep in the fridge for at least 5 days. Reheat individual slices in the microwave, or warm the whole casserole (covered with foil) in the oven at 350°F until bubbly again.