Add some oil to a pan and sauté onion and garlic till both are golden brown and fragrant
Add tomatoes paste and canned tomatoes and let it cook on for 10 minutes or till it reduces .
Add ground beef and let it cook till brown. Season with salt, pepper, oregano, thyme, rosemary, bayleaf and 1 stock cube. Then add bell peppers to the sauce and let it cook for an additional 5 minutes
At this point you should drain your macaroni reserving some of that pasta water. Then transfer the macaroni to the sauce
Toss gently with a wooden spoon for 2 minutes and if you find that the sauce is too thick then add a pasta water till you reach you desired consistency.
Turn off heat and serve!