In a skillet, saute onion and garlic in butter, until onion becomes tender and begins to brown.
Add undrained tomatoes, water, salt and pepper. Bring to a simmer.
While soup is simmering, toast rolled oats in a heavy bottomed sauce pan, stirring till they are brown.Stir in oats to soup and cook for about 6 to 10 minutes, and then serve.
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