This is a quick cooking recipe. Gather and prep all ingredients before you start cooking.To thaw the calamari (if yours is frozen), remove from the bag and place in a large colander. Continuously run cool water over it for 2-3 minutes or until they’re separated and no longer stiff.Transfer to a bowl, pour buttermilk over the top and refrigerate while you make the bread topping and sauce. Make the bread topping by melting butter in a large skillet over medium to medium-low heat. Add panko breadcrumbs and cook 1-3 minutes stirring often until golden. Stir in parsley then transfer to a bowl and set aside.
Wipe the skillet using paper towel then add butter over medium to medium-low heat.
Add minced garlic. Cook 1 minute stirring often. Add white wine and cook 3 minutes or until it has reduced by about half.
Start by adding 2 tablespoons of the lemon juice and all of the heavy cream. Simmer 4-5 minutes or until the sauce thickens to coat the back of a wooden spoon.
Drain calamari, pat dry then add to the sauce in a mostly single layer along with the capers and banana pepper rings. Cook 2 minutes or until calamari is opaque, slightly firm and just beginning to curl on the edges.
Taste and if you like season with salt and pepper. If you like a more lemony flavor, squeeze in the rest of the lemon juice.
Transfer to a serving dish, top with the reserved golden breadcrumbs and serve right away with sliced baguette or crusty bread.