Preheat oven to 425 degrees F.
Heat olive oil in an oven safe skillet or braising pan over medium heat.
Sauté the shallots and the chopped Swiss chard stems until softened about 5 minutes. Add in garlic, and sauté for another minute.
Add in the capers and the tomatoes with their juices. Bring to a boil and then lower the heat and simmer for 10 minutes. Stir occasionally to help the tomatoes break down; you want the sauce to thicken.
Season with the salt, pepper and the red pepper flakes. Stir in the chopped Swiss chard leaves and the basil; continue to simmer for 5 minutes until the Swiss chard has wilted into the tomatoes.
Take the pan off the heat and stir the olives and 1-cup feta into the tomato mixture. Neatly arrange the shrimp into the tomatoes, garnish with remaining crumbled feta and a few whole olives on top.
Place pan in oven and bake for 10 minutes until the shrimp has cooked through.
To give a bit of crust and color, move the pan to the top rack and broil until desired color. Remove from oven and squeeze lemon over and garnish with chopped fresh herbs.
Serve with crusty bread and lemon herb orzo. (For orzo toss fresh herbs, olive oil and lemon juice and zest, salt and pepper to taste with cooked orzo pasta.)