Mince the onion and carrot.

Heat olive oil in a frying pan over medium heat. Add onion, carrot, garlic, and salt, and sauté for 5 minutes. Add ground meat and cook until the meat changes color. Stir in flour until well combined.

Add canned tomatoes and all ☆ seasonings (sugar, miso, salt and pepper, water). Mix lightly, bring to a boil, cover, and simmer for 10 minutes. Remove the lid and simmer further to reduce the liquid.

Boil spaghetti in a pot of salted water according to package instructions. Drain well.