Put the cherry tomatoes, feta, oregano, garlic, balsamic and salt and pepper into the slow cooker. Cook on HIGH for 2 hours or LOW for 3 hours.
At the end of the cooking time, the tomatoes should be soft and bursting. Blend the sauce with a hand blender or mash with a fork if you don't have one.
Boil the pasta in salted water according to instructions and drain.
Add the basil and pasta to the sauce and stir well.
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