Heat oven to 400 degrees.
Core and peel the tomatoes.
Cut into wedges.
In a wide skillet, sautee garlic and shallots in oil, adding salt and pepper - about 6-8 minutes.
Add tomato wedges, s. and p. and red pepper flakes, and cook gently, stirring occasionally, until tomatoes have softened slightly - about 10 minutes.
Transfer the above to a shallow earthenware baking dish
In a bowl, mix the shrimp with a tbsp. of olive oil, s. and p. and then arrange in a single layer on top of the tomatoes. Sprinkle the feta over this and the oregano over the feta.
Bake 10-12 minutes, or until the top is lightly browned and bubbling.
Remove from oven and let stand for 5 minutes.
Serves up to 6.
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