Preheat oven to 350 degrees F.
In a Dutch oven or large casserole, add hamburger, onion and green onion. Cook, breaking up the beef until cooked through, drain. Add garlic and stir together. Add tomatoes and chili powder, stir and heat through. Add in macaroni noodles and toss together. Taste – add salt if desired.
Sprinkle top with cheese. Bake 20 to 25 minutes until bubbly and the top has begun to brown a bit.
Allow to sit for several minutes before serving,
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