Pre-heat a large, deep skillet over medium-high heat. Pat shrimp dry with a paper towel and sprinkle with salt and pepper to taste.
1 pound raw shrimp, salt and pepper
Add olive oil to pan then place shrimp in a single layer. Cook until shrimp are pink, about 3 minutes per side, flipping once; remove from pan, and set aside.
1 tablespoon extra virgin olive oil
To the hot pan, add the sliced onions, peppers, garlic, and another pinch of salt and pepper. Saute until peppers and onions are tender and slightly caramelized, about 7-9 minutes, stirring frequently.
1 medium onion, 2 bell peppers, any color, 2 cloves garlic
Return shrimp to the pan and add white wine. Use a wooden spoon to deglaze the bottom of the pan and continue to heat until alcohol burns off a bit, about 60 seconds.
1/4 cup dry white wine
Stir in tomatoes, oregano and chili flakes if using. Saute for another 2 minutes or until tomatoes are warmed through. Sprinkle with feta cheese and basil before serving.
1/2 teaspoon chili flakes, 2 cups diced tomatoes, 1 teaspoon dried oregano, 1/2 cup crumbled feta cheese, fresh basil
Notes
You can tell shrimp is done when it is bright pink and opaque, and it cooks fairly quickly. Overcooked shrimp will be a bit dry and tough.