Step 1
Place a rack in center of oven; preheat to 350°. Warmth 1 Tbsp. extra-virgin olive oil in a big Dutch oven or different heavy pot over medium-high. Cook dinner 1 lb. floor beef (20% fats) and 8 oz. scorching Italian sausage, casings eliminated, breaking apart into small items with a wood spoon, till effectively browned and cooked by means of, 10–12 minutes. Utilizing a slotted spoon, switch meat to a medium bowl, leaving fats behind.
Step 2
Add 2 massive onions, finely chopped, 6 garlic cloves, finely chopped, and 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt to identical pot; if pot seems dry, add as much as 1 Tbsp. extra oil. Cook dinner, stirring typically, till onions are translucent and golden across the edges, 8–10 minutes. Add 2 Tbsp. double-concentrated tomato paste and 1 Tbsp. dried oregano; prepare dinner, stirring always, till paste is brick crimson and starting to stay to backside of pot, 5–8 minutes. Return meat to pot.
Step 3
Add one 28-oz. can plus one 14.5-oz. can crushed tomatoes, ¼ cup Worcestershire sauce, 1 tsp. sugar, and 1 tsp. freshly floor pepper to pot. Carry to a simmer, stirring often and scraping up any browned bits caught to backside of pot. Take away from warmth and stir in 2 oz. Parmesan, finely grated (about 1 cup). Style tomato sauce and season with extra salt if wanted.
Step 4
Toss 12 oz. Fontina cheese, grated (about 3 cups), and remaining 4 oz. Parmesan, finely grated (about 2 cups), in a big bowl to mix; measure out 1 cup cheese and put aside for topping. Add 2 massive eggs, 24 oz. whole-milk cottage cheese, and remaining 2 garlic cloves, finely chopped, 2 tsp. Diamond Crystal or 1¼ tsp. Morton kosher salt, and 1 tsp. freshly floor pepper to remaining cheese in bowl. Combine vigorously with a wood spoon till mixed.
Step 5
Prepare 3 common dried lasagna noodles in a single layer in a 13×9″ baking dish. (If noodles are lengthy, prepare parallel to lengthy sides of baking dish; if noodles are quick, prepare parallel to quick sides of baking dish. Don’t fear about any gaps—noodles will swell as they prepare dinner.) Unfold 1½ cups tomato sauce over noodles. Scatter one third of Fontina combination evenly over sauce (combination will probably be stiff; use arms to interrupt off small items and scatter over sauce). Beginning with one other layer of noodles, repeat course of, creating 4 layers of noodles in whole and ending with a layer of tomato sauce. Prime lasagna with reserved cheese.
Step 6
Place baking dish on a big rimmed baking sheet (to catch drips) and bake lasagna till sauce is effervescent across the edges, prime is golden brown, and noodles are al dente (insert a skewer into heart of lasagna to test), 75–85 minutes. Let sit not less than quarter-hour and as much as 45 minutes earlier than serving.
Do Forward: Lasagna will be baked 2 days forward. Let cool fully; cowl loosely with foil and chill. Reheat, coated, in a 325° oven till warmed by means of, 30–45 minutes.
