Mince the onion, carrot, and garlic.

Heat olive oil in a frying pan over low heat and sauté garlic until fragrant.

Add onion and carrot, and sauté over medium heat until softened.

Add ground meat and cook until browned, then stir in flour until no longer powdery.

Add diced tomatoes, salt, pepper, and consomme powder, and simmer until thickened.

Boil water in a pot, add salt, and cook spaghetti according to package instructions.