While you gather your ingredients, combine ricotta cheese and parmesan in a small bowl and set aside—this gives the cheese time to meld slightly and makes final assembly seamless. Mince your garlic cloves fresh (this makes a real difference in flavor compared to pre-minced), and dice your onion into small pieces. Having everything prepped before you start cooking allows you to work quickly once the meat hits the pot.
Heat 2.5 tablespoons of olive oil in a large pot over medium-high heat. Once the oil shimmers, add the ground turkey and cook for 5-7 minutes, breaking it apart with a spoon as it cooks until it's no longer pink. Drain excess grease if needed, leaving just enough fat to coat the pan—this fat carries flavor. Add the diced onion and minced garlic to the pot and sauté for 2-3 minutes until fragrant and the onion begins to soften.
Stir in the italian seasoning, red pepper flakes, salt, and pepper, then add the tomato paste. Cook this mixture for about 2 minutes, stirring constantly—this allows the spices to bloom and the tomato paste to caramelize slightly, which deepens the overall flavor of your soup.
Pour in the crushed tomatoes, diced tomatoes, and chicken stock. Add the sugar to balance the acidity of the tomatoes. Bring the mixture to a boil over medium-high heat, then reduce to a gentle simmer. Once simmering, add the egg noodles and cook for 8-10 minutes, stirring occasionally, until the noodles are tender. The noodles will release starch into the broth, creating a lightly creamy base without any cream—I find this approach more authentic to traditional lasagna soup.
Remove the pot from heat and stir in the fresh parsley. Taste and adjust seasoning as needed. Ladle the soup into bowls and top each serving generously with a spoonful of the ricotta-parmesan mixture from Step 1 and a handful of mozzarella cheese. The residual heat will begin to melt the cheeses, creating a creamy, indulgent finish that echoes the richness of traditional lasagna.