Put a large pot of salted water (1 tablespoon of salt for every 2 quarts of water) on the stovetop on high heat. It can take a while for a large pot of water to come to a boil (this will be your pasta water), so prepare the sauce in the next steps while the water is heating.

In a large skillet heat 2 teaspoons of olive oil on medium-high heat. Add the ground beef and cook until it is lightly browned on all sides.

Remove the beef with a slotted spoon to a bowl. Drain off all but a tablespoon of fat.

Add the diced bell pepper and onions to the skillet (in the photo we are using yellow bell pepper and red onions).

Cook for 4 to 5 minutes, until the onions are translucent and the peppers softened. Add the minced garlic and cook half a minute more.

Return the browned ground beef to the pan. Stir to combine, reduce the heat to low, and cook for another 5 minutes.

Transfer the beef mixture to a medium-sized (3- to 4-quart) pot. Add the crushed tomatoes, tomato sauce, and tomato paste to the pot.

Add the parsley, oregano, and Italian seasonings, adjusting the amounts to taste. Sprinkle with garlic powder and/or garlic salt, to taste.

Sprinkle with red or white wine vinegar. Stir in sugar, a tablespoon at a time, tasting after each addition, to taste. (The amount of sugar needed will vary, depending on how acidic the tomatoes are that you are using.)

Add salt to taste, and note that you will later be adding Parmesan, which is salty.

Bring the sauce to a simmer and then lower the heat to maintain a low simmer. Cook for 15 to 45 minutes, stirring often. Scrape the bottom of the pot every so often so nothing sticks to the bottom and scorches.

Remove from heat.

By now the salted water you started heating in step one should be boiling. Add the dry lasagna noodles and cook them to al dente, per package directions. (Note noodles may be cooked in advance.)

Stir often to prevent from sticking. Make sure that water remains at a full rolling boil during the entire cooking to prevent noodles from sticking.

When ready, drain in a colander and rinse with cool water, gently separating any noodles that may be sticking together.

Spread a little olive oil on a large rimmed baking sheet, and lay out the cooked noodles on this sheet, turning them over so that they get coated with a little of the olive oil. This will prevent them from sticking together.

In a 9x13-inch casserole or lasagna dish, ladle a cup of sauce and spread it over the bottom of the dish. Arrange one layer of lasagna noodles lengthwise (about 3 long noodles, the edges may overlap, depending on your pan) over the sauce. Ladle a third of the remaining sauce over the noodles.

Sprinkle a layer of a third of the grated mozzarella on top of the lasagna sauce. Add half of the ricotta cheese, by placing cheese dollops every couple of inches. Sprinkle half the grated parmesan cheese evenly over the top of the ricotta cheese.

Apply the second layer of noodles and top it with half of the remaining sauce. Add half of the remaining mozzarella, the remaining ricotta cheese, and another the remaining Parmesan.

Finish with another layer of noodles. Spread the remaining sauce over the top layer of noodles and sprinkle with the remaining mozzarella cheese.

Cover the lasagna pan with aluminum foil, tented slightly so it doesn't touch the noodles or sauce). Bake at 375°F for 45 minutes. Uncover in the last 10 minutes if you'd like more of a crusty top or edges.

Allow the lasagna to cool for at least 15 before serving. Leftovers will keep for about 5 days. You can reheat it in a conventional oven or microwave. Leave the aluminum tent on for storage. (Try to keep the aluminum foil from touching the sauce.)

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