Place a Dutch oven or large pot on the stove over medium-high heat. Pour 3 tbsp of olive oil into the pot.

Add 4 cloves of minced garlic and 1 large finely chopped onion to the pot. Saute the garlic and onion for 2-3 minutes.

Add 2 sticks of finely chopped celery and 1 medium-sized finely chopped carrot to the pot. Cook for 4-5 minutes, stirring frequently to prevent burning.

Add 500 grams of minced beef(ground beef) to the cooking pot. Cook the beef for 5-6 minutes or until browned.

Pour 1 cup of beef stock over the mixture. Cook for another 2-3 minutes while stirring.

Add 2 bay leaves and 1 tbsp of chopped basil leaves to the pot.

Sprinkle 1 tsp of salt and 2 tsp of sugar over the sauce.

Season the beef with 1 tsp of oregano, 1 tsp of chili flakes, and ½ tsp of black pepper. Stir well to mix the seasonings.

Add 2 tbsp of tomato paste and 800 grams of canned whole tomatoes to the cooking pot. Mix the tomatoes and seasonings with the beef mixture.

Bring the sauce to a simmer. Reduce the heat to low, cover, and cook for 1 hour. Stir occasionally to prevent the sauce from sticking.

Place a deep saucepan on the stove and fill it with water. Bring the water to a boil. Cook the spaghetti when the bolognese sauce is nearly finished cooking.

Add 1 tbsp of salt to the boiling water and stir to dissolve.

Add 400 grams of spaghetti to the water and boil them according to the package instructions. Use tongs to ensure the spaghetti is submerged.

Once the spaghetti is cooked, drain and wash them with cold water to stop the cooking process.

Open the lid of the bolognese sauce and give it a final stir.

Place a portion of the spaghetti on the plate and spoon the bolognese sauce generously on top.

Serve immediately and enjoy your delicious homemade spaghetti bolognese.