Preheat your oven to 375°F (190°C).

In a large skillet, heat olive oil and sauté chopped onion until translucent, about 5 minutes.

Stir in minced garlic and cook for another 1–2 minutes until fragrant.

Add ground beef and pork, cooking until browned, about 8–10 minutes.

Incorporate diced tomatoes and tomato paste; season with sugar, dried basil, oregano, red pepper flakes, salt, and pepper.

Let the mixture simmer for 30 minutes.

In a medium bowl, combine ricotta cheese, egg, a pinch of basil, salt, and pepper until smooth.

Grease a 9x13 baking dish, start building the layers with meat sauce, noodles, ricotta mixture, and mozzarella.

Cover with foil and bake for 45 minutes, then remove foil and bake for an additional 15 minutes.

Let the lasagna rest for at least 15 minutes before slicing.