Prep your ingredients. This includes chopping veggies, shredding and grating cheeses.
Heat 1 Tbsp olive oil in a dutch oven or large enameled pot over medium-high heat. Crumble ground chuck and Italian sausage in heated oil. Seasoned lightly with salt and pepper. Stir until meat is browned.
Remove from heat and drain meat. Once drained, return to pot.
Return pot to medium-high heat. Add onion and bell pepper. Stir and cook about 5 minutes.
Add tomato paste ,crush tomatoes, tomato sauce, and diced tomatoes. Stir together. Add garlic, 1 tsp salt, sugar, Italian seasoning and crushed red pepper. Stir together. Add basil and parsley. Stir together.
Bring to simmer, and reduce heat to low. Cook covered for minimum of 1 hour. The longer the sauce cooks, the better it will be. Stir occasionally. Sauce will reduce and thicken. Taste sauce after it has cooked, and add more salt if needed.
Cook pasta according to instructions until al dente. Drain pasta. Do not rinse. I recommend cooking more than 12 lasagna noodles. Sometimes these noodles break. It's always good to have extras on hand.
In a small mixing bowl, lightly beat egg. Add Ricotta cheese, dash of nutmeg and tsp of Italian seasoning. Mix together thoroughly.
Preheat oven to 375 degrees. In baking dish, spread a generous amount of meat sauce in bottom of dish (about 1 cup). Align 4 noodles over sauce (I align 3 horizontally, then 1 vertically at the end). Spread half of ricotta mixture over noodles. Sprinkle 3/4 cup mozzarella cheese evenly over ricotta mixture. Add layer of meat sauce (about cup and a half). Sprinkle with 1/2 cup of Parmesan cheese.
Align 4 noodles over sauce. Spread rest of ricotta mixture over noodles. Sprinkle 3/4 cup mozzarella cheese evenly over ricotta mixture. Add layer of meat sauce (about cup and a half). Sprinkle with 1/2 cup of Parmesan cheese.
Align 4 noodles over sauce. Spread remainder of meat sauce over noodles. Sprinkle rest of mozzarella over sauce. Layer pieces of provolone with mozzarella. Sprinkle with rest of Parmesan.
Cover with foil and bake in preheated oven for 30 minutes.
Remove foil and return to oven uncovered for 20 minutes.
Remove from oven and let sit for 15 minutes before cutting and serving.